Add calls to EnsureGPUMemoryAvailable into GLES2DecoderImpl

gpu/command_buffer/service/renderbuffer_manager.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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_RENDERBUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_RENDERBUFFER_MANAGER_H_
 
 #include <string>
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
@@ skipping 152 matching lines @@
   // Removes a renderbuffer info for the given renderbuffer.
   void RemoveRenderbufferInfo(GLuint client_id);
 
   // Gets a client id for a given service id.
   bool GetClientId(GLuint service_id, GLuint* client_id) const;
 
   size_t mem_represented() const {
     return memory_tracker_->GetMemRepresented();
   }
 
+  static bool ComputeEstimatedRenderbufferSize(
+      int width, int height, int samples, int internal_format, uint32* size);
+  static GLenum InternalRenderbufferFormatToImplFormat(GLenum impl_format);
+
  private:
   void StartTracking(RenderbufferInfo* renderbuffer);
   void StopTracking(RenderbufferInfo* renderbuffer);
 
   scoped_ptr<MemoryTypeTracker> memory_tracker_;
 
   GLint max_renderbuffer_size_;
   GLint max_samples_;
 
   int num_uncleared_renderbuffers_;
 
   // Counts the number of RenderbufferInfo allocated with 'this' as its manager.
   // Allows to check no RenderbufferInfo will outlive this.
   unsigned renderbuffer_info_count_;
 
   bool have_context_;
 
   // Info for each renderbuffer in the system.
   typedef base::hash_map<GLuint, RenderbufferInfo::Ref> RenderbufferInfoMap;
   RenderbufferInfoMap renderbuffer_infos_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderbufferManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_RENDERBUFFER_MANAGER_H_