Remove WebGraphicsContext3D reason from the CauseForGpuLaunch enum

content/common/gpu_process_launch_causes.h

Index: content/common/gpu_process_launch_causes.h
diff --git a/content/common/gpu_process_launch_causes.h b/content/common/gpu_process_launch_causes.h
index b7acd351152f871bb3034614289a347e684c69de..6a8f377a0396012229bfe2e098d5435a955599d0 100644
--- a/content/common/gpu_process_launch_causes.h
+++ b/content/common/gpu_process_launch_causes.h
@@ -13,8 +13,9 @@ enum CauseForGpuLaunch {
   // Start enum from 2 to keep the same values for the histogram.
   CAUSE_FOR_GPU_LAUNCH_GPUDATAMANAGER_REQUESTCOMPLETEGPUINFOIFNEEDED = 2,
   CAUSE_FOR_GPU_LAUNCH_RENDERWIDGETFULLSCREENPEPPER_CREATECONTEXT,
-  CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE,
-  CAUSE_FOR_GPU_LAUNCH_NO_LAUNCH,
+  // Deprecated
+  // CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE,
+  CAUSE_FOR_GPU_LAUNCH_NO_LAUNCH = 4,
   CAUSE_FOR_GPU_LAUNCH_VIDEODECODEACCELERATOR_INITIALIZE,
   CAUSE_FOR_GPU_LAUNCH_PEPPERPLATFORMCONTEXT3DIMPL_INITIALIZE,
   CAUSE_FOR_GPU_LAUNCH_BROWSER_STARTUP,
@@ -24,6 +25,12 @@ enum CauseForGpuLaunch {
   CAUSE_FOR_GPU_LAUNCH_JPEGDECODEACCELERATOR_INITIALIZE,
   CAUSE_FOR_GPU_LAUNCH_MOJO_SETUP,
   CAUSE_FOR_GPU_LAUNCH_GET_GPU_SERVICE_REGISTRY,
+  CAUSE_FOR_GPU_LAUNCH_BROWSER_SHARED_MAIN_THREAD_CONTEXT,
+  CAUSE_FOR_GPU_LAUNCH_RENDERER_SHARED_MAIN_THREAD_CONTEXT,
+  CAUSE_FOR_GPU_LAUNCH_WEBGL_CONTEXT,
+  CAUSE_FOR_GPU_LAUNCH_SHARED_WORKER_THREAD_CONTEXT,
+  CAUSE_FOR_GPU_LAUNCH_RENDERER_VERIFY_GPU_COMPOSITING,
+  CAUSE_FOR_GPU_LAUNCH_DISPLAY_COMPOSITOR_CONTEXT,
 
   // All new values should be inserted above this point so that
   // existing values continue to match up with those in histograms.xml.