Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
diff --git a/docs/dyn/bigquerydatatransfer_v1.projects.transferConfigs.runs.html b/docs/dyn/bigquerydatatransfer_v1.projects.transferConfigs.runs.html
index 8c7412f..3d94552 100644
--- a/docs/dyn/bigquerydatatransfer_v1.projects.transferConfigs.runs.html
+++ b/docs/dyn/bigquerydatatransfer_v1.projects.transferConfigs.runs.html
@@ -72,7 +72,7 @@
 
 </style>
 
-<h1><a href="bigquerydatatransfer_v1.html">BigQuery Data Transfer Service API</a> . <a href="bigquerydatatransfer_v1.projects.html">projects</a> . <a href="bigquerydatatransfer_v1.projects.transferConfigs.html">transferConfigs</a> . <a href="bigquerydatatransfer_v1.projects.transferConfigs.runs.html">runs</a></h1>
+<h1><a href="bigquerydatatransfer_v1.html">BigQuery Data Transfer API</a> . <a href="bigquerydatatransfer_v1.projects.html">projects</a> . <a href="bigquerydatatransfer_v1.projects.transferConfigs.html">transferConfigs</a> . <a href="bigquerydatatransfer_v1.projects.transferConfigs.runs.html">runs</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
   <code><a href="bigquerydatatransfer_v1.projects.transferConfigs.runs.transferLogs.html">transferLogs()</a></code>
@@ -86,7 +86,7 @@
   <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
 <p class="firstline">Returns information about the particular transfer run.</p>
 <p class="toc_element">
-  <code><a href="#list">list(parent, pageSize=None, runAttempt=None, statuses=None, pageToken=None, x__xgafv=None)</a></code></p>
+  <code><a href="#list">list(parent, pageSize=None, pageToken=None, runAttempt=None, states=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Returns information about running and completed jobs.</p>
 <p class="toc_element">
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
@@ -135,42 +135,53 @@
   An object of the form:
 
     { # Represents a data transfer run.
-    "status": "A String", # Data transfer run status. Ignored for input requests.
-        # @OutputOnly
-    "updateTime": "A String", # Last time the data transfer run status was updated.
-        # @OutputOnly
-    "destinationDatasetId": "A String", # The BigQuery target dataset id.
+    "updateTime": "A String", # Output only. Last time the data transfer run state was updated.
+    "destinationDatasetId": "A String", # Output only. The BigQuery target dataset id.
     "name": "A String", # The resource name of the transfer run.
         # Transfer run names have the form
-        # `projects/{project_id}/transferConfigs/{config_id}/runs/{run_id}`.
+        # `projects/{project_id}/locations/{location}/transferConfigs/{config_id}/runs/{run_id}`.
         # The name is ignored when creating a transfer run.
-    "schedule": "A String", # Describes the schedule of this transfer run if it was created as part of
-        # a regular schedule. For batch transfer runs that are directly created,
-        # this is empty.
+    "schedule": "A String", # Output only. Describes the schedule of this transfer run if it was
+        # created as part of a regular schedule. For batch transfer runs that are
+        # scheduled manually, this is empty.
         # NOTE: the system might choose to delay the schedule depending on the
-        # current load, so `schedule_time` doesn't always matches this.
-        # @OutputOnly
+        # current load, so `schedule_time` doesn't always match this.
     "scheduleTime": "A String", # Minimum time after which a transfer run can be started.
-    "userId": "A String", # The user id for this transfer run.
-        # @OutputOnly
-    "dataSourceId": "A String", # Data source id.
-        # @OutputOnly
-    "startTime": "A String", # Time when transfer run was started. Parameter ignored by server for input
-        # requests.
-        # @OutputOnly
-    "params": { # Data transfer specific parameters.
+    "userId": "A String", # Deprecated. Unique ID of the user on whose behalf transfer is done.
+    "state": "A String", # Data transfer run state. Ignored for input requests.
+    "errorStatus": { # The `Status` type defines a logical error model that is suitable for # Status of the transfer run.
+        # different programming environments, including REST APIs and RPC APIs. It is
+        # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+        # three pieces of data: error code, error message, and error details.
+        #
+        # You can find out more about this error model and how to work with it in the
+        # [API Design Guide](https://cloud.google.com/apis/design/errors).
+      "message": "A String", # A developer-facing error message, which should be in English. Any
+          # user-facing error message should be localized and sent in the
+          # google.rpc.Status.details field, or localized by the client.
+      "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+      "details": [ # A list of messages that carry the error details.  There is a common set of
+          # message types for APIs to use.
+        {
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+      ],
+    },
+    "params": { # Output only. Data transfer specific parameters.
       "a_key": "", # Properties of the object.
     },
+    "startTime": "A String", # Output only. Time when transfer run was started.
+        # Parameter ignored by server for input requests.
+    "dataSourceId": "A String", # Output only. Data source id.
     "runTime": "A String", # For batch transfer runs, specifies the date and time that
         # data should be ingested.
-    "endTime": "A String", # Time when transfer run ended. Parameter ignored by server for input
-        # requests.
-        # @OutputOnly
+    "endTime": "A String", # Output only. Time when transfer run ended.
+        # Parameter ignored by server for input requests.
   }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(parent, pageSize=None, runAttempt=None, statuses=None, pageToken=None, x__xgafv=None)</code>
+    <code class="details" id="list">list(parent, pageSize=None, pageToken=None, runAttempt=None, states=None, x__xgafv=None)</code>
   <pre>Returns information about running and completed jobs.
 
 Args:
@@ -178,13 +189,13 @@
 Format of transfer configuration resource name is:
 `projects/{project_id}/transferConfigs/{config_id}`. (required)
   pageSize: integer, Page size. The default page size is the maximum value of 1000 results.
-  runAttempt: string, Indicates how run attempts are to be pulled.
-  statuses: string, When specified, only transfer runs with requested statuses are returned. (repeated)
   pageToken: string, Pagination token, which can be used to request a specific page
 of `ListTransferRunsRequest` list results. For multiple-page
 results, `ListTransferRunsResponse` outputs
 a `next_page` token, which can be used as the
 `page_token` value to request the next page of list results.
+  runAttempt: string, Indicates how run attempts are to be pulled.
+  states: string, When specified, only transfer runs with requested states are returned. (repeated)
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -194,45 +205,54 @@
   An object of the form:
 
     { # The returned list of pipelines in the project.
-    "nextPageToken": "A String", # The next-pagination token. For multiple-page list results,
+    "nextPageToken": "A String", # Output only. The next-pagination token. For multiple-page list results,
         # this token can be used as the
         # `ListTransferRunsRequest.page_token`
         # to request the next page of list results.
-        # @OutputOnly
-    "transferRuns": [ # The stored pipeline transfer runs.
-        # @OutputOnly
+    "transferRuns": [ # Output only. The stored pipeline transfer runs.
       { # Represents a data transfer run.
-        "status": "A String", # Data transfer run status. Ignored for input requests.
-            # @OutputOnly
-        "updateTime": "A String", # Last time the data transfer run status was updated.
-            # @OutputOnly
-        "destinationDatasetId": "A String", # The BigQuery target dataset id.
+        "updateTime": "A String", # Output only. Last time the data transfer run state was updated.
+        "destinationDatasetId": "A String", # Output only. The BigQuery target dataset id.
         "name": "A String", # The resource name of the transfer run.
             # Transfer run names have the form
-            # `projects/{project_id}/transferConfigs/{config_id}/runs/{run_id}`.
+            # `projects/{project_id}/locations/{location}/transferConfigs/{config_id}/runs/{run_id}`.
             # The name is ignored when creating a transfer run.
-        "schedule": "A String", # Describes the schedule of this transfer run if it was created as part of
-            # a regular schedule. For batch transfer runs that are directly created,
-            # this is empty.
+        "schedule": "A String", # Output only. Describes the schedule of this transfer run if it was
+            # created as part of a regular schedule. For batch transfer runs that are
+            # scheduled manually, this is empty.
             # NOTE: the system might choose to delay the schedule depending on the
-            # current load, so `schedule_time` doesn't always matches this.
-            # @OutputOnly
+            # current load, so `schedule_time` doesn't always match this.
         "scheduleTime": "A String", # Minimum time after which a transfer run can be started.
-        "userId": "A String", # The user id for this transfer run.
-            # @OutputOnly
-        "dataSourceId": "A String", # Data source id.
-            # @OutputOnly
-        "startTime": "A String", # Time when transfer run was started. Parameter ignored by server for input
-            # requests.
-            # @OutputOnly
-        "params": { # Data transfer specific parameters.
+        "userId": "A String", # Deprecated. Unique ID of the user on whose behalf transfer is done.
+        "state": "A String", # Data transfer run state. Ignored for input requests.
+        "errorStatus": { # The `Status` type defines a logical error model that is suitable for # Status of the transfer run.
+            # different programming environments, including REST APIs and RPC APIs. It is
+            # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+            # three pieces of data: error code, error message, and error details.
+            #
+            # You can find out more about this error model and how to work with it in the
+            # [API Design Guide](https://cloud.google.com/apis/design/errors).
+          "message": "A String", # A developer-facing error message, which should be in English. Any
+              # user-facing error message should be localized and sent in the
+              # google.rpc.Status.details field, or localized by the client.
+          "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+          "details": [ # A list of messages that carry the error details.  There is a common set of
+              # message types for APIs to use.
+            {
+              "a_key": "", # Properties of the object. Contains field @type with type URL.
+            },
+          ],
+        },
+        "params": { # Output only. Data transfer specific parameters.
           "a_key": "", # Properties of the object.
         },
+        "startTime": "A String", # Output only. Time when transfer run was started.
+            # Parameter ignored by server for input requests.
+        "dataSourceId": "A String", # Output only. Data source id.
         "runTime": "A String", # For batch transfer runs, specifies the date and time that
             # data should be ingested.
-        "endTime": "A String", # Time when transfer run ended. Parameter ignored by server for input
-            # requests.
-            # @OutputOnly
+        "endTime": "A String", # Output only. Time when transfer run ended.
+            # Parameter ignored by server for input requests.
       },
     ],
   }</pre>