Fix a bug in the implementation of DescheduleUntilFinishedCHROMIUM.

gpu/command_buffer/service/gles2_cmd_decoder.h

Index: gpu/command_buffer/service/gles2_cmd_decoder.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.h b/gpu/command_buffer/service/gles2_cmd_decoder.h
index 589f8af77f51124877a5a75c75fb98eaa82f4c00..94c28677f1f5a48a789bfebcad7bdf690cf07fe7 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.h
@@ -237,6 +237,12 @@ class GPU_EXPORT GLES2Decoder : public base::SupportsWeakPtr<GLES2Decoder>,
   // Perform any idle work that needs to be made.
   virtual void PerformIdleWork() = 0;
 
+  // Whether there is state that needs to be regularly polled.
+  virtual bool HasPollingWork() const = 0;
+
+  // Perform necessary polling.
+  virtual void PerformPollingWork() = 0;
+
   // Get the service texture ID corresponding to a client texture ID.
   // If no such record is found then return false.
   virtual bool GetServiceTextureId(uint32_t client_texture_id,