Update Mac dimensions for upgraded bots.

Bug: chromium:756463
No-Try: true
Change-Id: Ica864811e59162d6cfa1e89aec9c0ce8090d27df
Reviewed-on: https://skia-review.googlesource.com/36040
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
diff --git a/infra/bots/tasks.json b/infra/bots/tasks.json
index 0af07d7..39193d7 100644
--- a/infra/bots/tasks.json
+++ b/infra/bots/tasks.json
@@ -7826,7 +7826,7 @@
       ],
       "dimensions": [
         "gpu:8086:0a2e",
-        "os:Mac-10.11",
+        "os:Mac-10.12",
         "pool:Skia"
       ],
       "execution_timeout_ns": 14400000000000,
@@ -7873,7 +7873,7 @@
       ],
       "dimensions": [
         "gpu:8086:0a2e",
-        "os:Mac-10.11",
+        "os:Mac-10.12",
         "pool:Skia"
       ],
       "execution_timeout_ns": 14400000000000,
@@ -7920,7 +7920,7 @@
       ],
       "dimensions": [
         "gpu:8086:0a2e",
-        "os:Mac-10.11",
+        "os:Mac-10.12",
         "pool:Skia"
       ],
       "execution_timeout_ns": 14400000000000,
@@ -15216,7 +15216,7 @@
       ],
       "dimensions": [
         "gpu:8086:0a2e",
-        "os:Mac-10.11",
+        "os:Mac-10.12",
         "pool:Skia"
       ],
       "execution_timeout_ns": 14400000000000,
@@ -15263,7 +15263,7 @@
       ],
       "dimensions": [
         "gpu:8086:0a2e",
-        "os:Mac-10.11",
+        "os:Mac-10.12",
         "pool:Skia"
       ],
       "execution_timeout_ns": 14400000000000,
@@ -15310,7 +15310,7 @@
       ],
       "dimensions": [
         "gpu:8086:0a2e",
-        "os:Mac-10.11",
+        "os:Mac-10.12",
         "pool:Skia"
       ],
       "execution_timeout_ns": 14400000000000,