Build browser tests on all gpu release bots

Work-around as browser_tests are erroneously not rebuilt properly on
gpu bots.

BUG=chromium:714976
TBR=kbr@chromium.org,fjhenigman@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
NOTRY=true

Review-Url: https://codereview.chromium.org/2841833003
Cr-Commit-Position: refs/heads/master@{#467292}

content/test/gpu/generate_buildbot_json.py

@@ -64,11 +64,19 @@ WATERFALL = {
   'type': Types.GPU,
 
   'builders': {
-    'GPU Win Builder' : {},
+    'GPU Win Builder' : {
+      # TODO(machenbach): Remove additional browser_tests here and on several
+      # release bots below when http://crbug.com/714976 is resolved.
+      'additional_compile_targets' : [ "browser_tests" ],
+    },
     'GPU Win Builder (dbg)' : {},
-    'GPU Mac Builder' : {},
+    'GPU Mac Builder' : {
+      'additional_compile_targets' : [ "browser_tests" ],
+    },
     'GPU Mac Builder (dbg)' : {},
-    'GPU Linux Builder' : {},
+    'GPU Linux Builder' : {
+      'additional_compile_targets' : [ "browser_tests" ],
+    },
     'GPU Linux Builder (dbg)' : {},
    },
 
@@ -171,13 +179,23 @@ FYI_WATERFALL = {
   'type': Types.GPU_FYI,
 
   'builders': {
-    'GPU Win Builder' : {},
+    'GPU Win Builder' : {
+      # TODO(machenbach): Remove additional browser_tests here and on several
+      # release bots below when http://crbug.com/714976 is resolved.
+      'additional_compile_targets' : [ "browser_tests" ],
+    },
     'GPU Win Builder (dbg)' : {},
-    'GPU Win x64 Builder' : {},
+    'GPU Win x64 Builder' : {
+      'additional_compile_targets' : [ "browser_tests" ],
+    },
     'GPU Win x64 Builder (dbg)' : {},
-    'GPU Mac Builder' : {},
+    'GPU Mac Builder' : {
+      'additional_compile_targets' : [ "browser_tests" ],
+    },
     'GPU Mac Builder (dbg)' : {},
-    'GPU Linux Builder' : {},
+    'GPU Linux Builder' : {
+      'additional_compile_targets' : [ "browser_tests" ],
+    },
     'GPU Linux Builder (dbg)' : {},
     'Linux ChromiumOS Builder' : {
       'additional_compile_targets' : [ "All" ]

testing/buildbot/chromium.gpu.fyi.json

@@ -2722,13 +2722,29 @@
       }
     ]
   },
-  "GPU Linux Builder": {},
+  "GPU Linux Builder": {
+    "additional_compile_targets": [
+      "browser_tests"
+    ]
+  },
   "GPU Linux Builder (dbg)": {},
-  "GPU Mac Builder": {},
+  "GPU Mac Builder": {
+    "additional_compile_targets": [
+      "browser_tests"
+    ]
+  },
   "GPU Mac Builder (dbg)": {},
-  "GPU Win Builder": {},
+  "GPU Win Builder": {
+    "additional_compile_targets": [
+      "browser_tests"
+    ]
+  },
   "GPU Win Builder (dbg)": {},
-  "GPU Win x64 Builder": {},
+  "GPU Win x64 Builder": {
+    "additional_compile_targets": [
+      "browser_tests"
+    ]
+  },
   "GPU Win x64 Builder (dbg)": {},
   "Linux ChromiumOS Builder": {
     "additional_compile_targets": [

testing/buildbot/chromium.gpu.json

 {
   "AAAAA1 AUTOGENERATED FILE DO NOT EDIT": {},
   "AAAAA2 See generate_buildbot_json.py to make changes": {},
-  "GPU Linux Builder": {},
+  "GPU Linux Builder": {
+    "additional_compile_targets": [
+      "browser_tests"
+    ]
+  },
   "GPU Linux Builder (dbg)": {},
-  "GPU Mac Builder": {},
+  "GPU Mac Builder": {
+    "additional_compile_targets": [
+      "browser_tests"
+    ]
+  },
   "GPU Mac Builder (dbg)": {},
-  "GPU Win Builder": {},
+  "GPU Win Builder": {
+    "additional_compile_targets": [
+      "browser_tests"
+    ]
+  },
   "GPU Win Builder (dbg)": {},
   "Linux Debug (NVIDIA)": {
     "gtest_tests": [