Add GLES2Implemention::FreeUnusedSharedMemory

gpu/command_buffer/client/gles2_implementation.h

 // Copyright (c) 2011 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_CLIENT_GLES2_IMPLEMENTATION_H_
 #define GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_H_
 
 #include <GLES2/gl2.h>
 
 #include <map>
@@ skipping 179 matching lines @@
   GLuint MakeTextureId() {
     GLuint id;
     texture_id_handler_->MakeIds(0, 1, &id);
     return id;
   }
 
   void FreeTextureId(GLuint id) {
     texture_id_handler_->FreeIds(1, &id);
   }
 
+  void FreeUnusedSharedMemory();
+
  private:
   // Wraps RingBufferWrapper to provide aligned allocations.
   class AlignedRingBuffer : public RingBufferWrapper {
    public:
     AlignedRingBuffer(RingBuffer::Offset base_offset,
                       unsigned int size,
                       CommandBufferHelper *helper,
                       void *base)
         : RingBufferWrapper(base_offset, size, helper, base) {
     }
@@ skipping 320 matching lines @@
 
 inline bool GLES2Implementation::GetTexParameterivHelper(
     GLenum /* target */, GLenum /* pname */, GLint* /* params */) {
   return false;
 }
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_H_