gpu: Reduce GL context switches used to check pending queries.

gpu/command_buffer/service/gles2_cmd_decoder.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file contains the GLES2Decoder class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 
 #include <string>
@@ skipping 169 matching lines @@
 
   // Gets the VertexArrayManager for this context.
   virtual VertexArrayManager* GetVertexArrayManager() = 0;
 
   // Gets the ImageManager for this context.
   virtual ImageManager* GetImageManager() = 0;
 
   // Gets the ValuebufferManager for this context.
   virtual ValuebufferManager* GetValuebufferManager() = 0;
 
-  // Process any pending queries. Returns false if there are no pending queries.
-  virtual bool ProcessPendingQueries(bool did_finish) = 0;
+  // Returns false if there are no pending queries.
+  virtual bool HasPendingQueries() const = 0;
 
-  // Returns false if there are no idle work to be made.
-  virtual bool HasMoreIdleWork() = 0;
+  // Process any pending queries.
+  virtual void ProcessPendingQueries(bool did_finish) = 0;
 
+  // Returns false if there is no idle work to be made.
+  virtual bool HasMoreIdleWork() const = 0;
+
+  // Perform any idle work that needs to be made.
   virtual void PerformIdleWork() = 0;
 
   // Sets a callback which is called when a glResizeCHROMIUM command
   // is processed.
   virtual void SetResizeCallback(
       const base::Callback<void(gfx::Size, float)>& callback) = 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 client_texture_id,
@@ skipping 56 matching lines @@
   bool log_commands_;
   bool unsafe_es3_apis_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(GLES2Decoder);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_