Update docs for 1.4.0 release
diff --git a/docs/dyn/replicapoolupdater_v1beta1.rollingUpdates.html b/docs/dyn/replicapoolupdater_v1beta1.rollingUpdates.html
index 542148c..6df9e24 100644
--- a/docs/dyn/replicapoolupdater_v1beta1.rollingUpdates.html
+++ b/docs/dyn/replicapoolupdater_v1beta1.rollingUpdates.html
@@ -185,9 +185,12 @@
       "kind": "replicapoolupdater#rollingUpdate", # [Output Only] Type of the resource.
       "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
       "user": "A String", # [Output Only] User who requested the update, for example: user@example.com.
-      "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
+      "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
+      "instances": [ # List of fully-qualified URLs of instances to be updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
+        "A String",
+      ],
       "instanceTemplate": "A String", # Fully-qualified URL of an instance template to apply.
-      "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups.
+      "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups and explicit lists of instances.
       "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the update.
       "error": { # [Output Only] Errors that occurred during rolling update.
         "errors": [ # [Output Only] The array of errors encountered while processing this operation.
@@ -202,9 +205,6 @@
         "instanceStartupTimeoutSec": 42, # Maximum amount of time we will wait after finishing all steps until we receive HEALTHY state for instance. If this deadline is exceeded instance update is considered as failed.
         "maxNumConcurrentInstances": 42, # Maximum number of instances that can be updated simultaneously (concurrently). An update of an instance starts when the instance is about to be restarted and finishes after the instance has been restarted and the sleep period (defined by sleepAfterInstanceRestartSec) has passed.
         "minInstanceUpdateTimeSec": 42, # Specifies minimum amount of time we will spend on updating single instance, measuring at the start of the first update action (e.g. Recreate call on Instance Group Manager or Stop call on Instance resource). If actual instance update takes less time we will simply sleep before proceeding with next instance.
-        "canary": { # Parameters of a canary phase. If absent, canary will NOT be performed.
-          "numInstances": 42, # Number of instances updated as a part of canary phase. If absent, the default number of instances will be used.
-        },
         "sleepAfterInstanceRestartSec": 42, # Time period after the instance has been restarted but before marking the update of this instance as done. This field is deprecated and ignored by Rolling Updater.
         "maxNumFailedInstances": 42, # Maximum number of instance updates that can fail without failing the group update. Instance update is considered failed if any of it's update actions (e.g. Stop call on Instance resource in Rolling Reboot) failed with permanent failure, or if after finishing all update actions this instance is in UNHEALTHY state.
         "autoPauseAfterInstances": 42, # Number of instances updated before the update gets automatically paused.
@@ -213,7 +213,7 @@
       "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
       "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
       "selfLink": "A String", # [Output Only] The fully qualified URL for the resource.
-      "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
+      "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
     }</pre>
 </div>
 
@@ -238,9 +238,12 @@
     "kind": "replicapoolupdater#rollingUpdate", # [Output Only] Type of the resource.
     "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
     "user": "A String", # [Output Only] User who requested the update, for example: user@example.com.
-    "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
+    "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
+    "instances": [ # List of fully-qualified URLs of instances to be updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
+      "A String",
+    ],
     "instanceTemplate": "A String", # Fully-qualified URL of an instance template to apply.
-    "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups.
+    "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups and explicit lists of instances.
     "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the update.
     "error": { # [Output Only] Errors that occurred during rolling update.
       "errors": [ # [Output Only] The array of errors encountered while processing this operation.
@@ -255,9 +258,6 @@
       "instanceStartupTimeoutSec": 42, # Maximum amount of time we will wait after finishing all steps until we receive HEALTHY state for instance. If this deadline is exceeded instance update is considered as failed.
       "maxNumConcurrentInstances": 42, # Maximum number of instances that can be updated simultaneously (concurrently). An update of an instance starts when the instance is about to be restarted and finishes after the instance has been restarted and the sleep period (defined by sleepAfterInstanceRestartSec) has passed.
       "minInstanceUpdateTimeSec": 42, # Specifies minimum amount of time we will spend on updating single instance, measuring at the start of the first update action (e.g. Recreate call on Instance Group Manager or Stop call on Instance resource). If actual instance update takes less time we will simply sleep before proceeding with next instance.
-      "canary": { # Parameters of a canary phase. If absent, canary will NOT be performed.
-        "numInstances": 42, # Number of instances updated as a part of canary phase. If absent, the default number of instances will be used.
-      },
       "sleepAfterInstanceRestartSec": 42, # Time period after the instance has been restarted but before marking the update of this instance as done. This field is deprecated and ignored by Rolling Updater.
       "maxNumFailedInstances": 42, # Maximum number of instance updates that can fail without failing the group update. Instance update is considered failed if any of it's update actions (e.g. Stop call on Instance resource in Rolling Reboot) failed with permanent failure, or if after finishing all update actions this instance is in UNHEALTHY state.
       "autoPauseAfterInstances": 42, # Number of instances updated before the update gets automatically paused.
@@ -266,7 +266,7 @@
     "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
     "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
     "selfLink": "A String", # [Output Only] The fully qualified URL for the resource.
-    "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
+    "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
   }
 
 
@@ -347,9 +347,12 @@
           "kind": "replicapoolupdater#rollingUpdate", # [Output Only] Type of the resource.
           "description": "A String", # An optional textual description of the resource; provided by the client when the resource is created.
           "user": "A String", # [Output Only] User who requested the update, for example: user@example.com.
-          "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
+          "instanceGroup": "A String", # Fully-qualified URL of an instance group being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
+          "instances": [ # List of fully-qualified URLs of instances to be updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
+            "A String",
+          ],
           "instanceTemplate": "A String", # Fully-qualified URL of an instance template to apply.
-          "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups.
+          "actionType": "A String", # Specifies the action to take for each instance within the instance group. This can be RECREATE which will recreate each instance and is only available for managed instance groups. It can also be REBOOT which performs a soft reboot for each instance and is only available for regular (non-managed) instance groups and explicit lists of instances.
           "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the update.
           "error": { # [Output Only] Errors that occurred during rolling update.
             "errors": [ # [Output Only] The array of errors encountered while processing this operation.
@@ -364,9 +367,6 @@
             "instanceStartupTimeoutSec": 42, # Maximum amount of time we will wait after finishing all steps until we receive HEALTHY state for instance. If this deadline is exceeded instance update is considered as failed.
             "maxNumConcurrentInstances": 42, # Maximum number of instances that can be updated simultaneously (concurrently). An update of an instance starts when the instance is about to be restarted and finishes after the instance has been restarted and the sleep period (defined by sleepAfterInstanceRestartSec) has passed.
             "minInstanceUpdateTimeSec": 42, # Specifies minimum amount of time we will spend on updating single instance, measuring at the start of the first update action (e.g. Recreate call on Instance Group Manager or Stop call on Instance resource). If actual instance update takes less time we will simply sleep before proceeding with next instance.
-            "canary": { # Parameters of a canary phase. If absent, canary will NOT be performed.
-              "numInstances": 42, # Number of instances updated as a part of canary phase. If absent, the default number of instances will be used.
-            },
             "sleepAfterInstanceRestartSec": 42, # Time period after the instance has been restarted but before marking the update of this instance as done. This field is deprecated and ignored by Rolling Updater.
             "maxNumFailedInstances": 42, # Maximum number of instance updates that can fail without failing the group update. Instance update is considered failed if any of it's update actions (e.g. Stop call on Instance resource in Rolling Reboot) failed with permanent failure, or if after finishing all update actions this instance is in UNHEALTHY state.
             "autoPauseAfterInstances": 42, # Number of instances updated before the update gets automatically paused.
@@ -375,7 +375,7 @@
           "creationTimestamp": "A String", # [Output Only] Creation timestamp in RFC3339 text format.
           "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
           "selfLink": "A String", # [Output Only] The fully qualified URL for the resource.
-          "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager and instanceGroup must be set.
+          "instanceGroupManager": "A String", # Fully-qualified URL of an instance group manager being updated. Exactly one of instanceGroupManager, instanceGroup and instance list must be set.
         },
     ],
     "kind": "replicapoolupdater#rollingUpdateList", # [Output Only] Type of the resource.