cc: Free gpu resources when we are invisible or TM is oom.

cc/resources/resource_provider.h

 // Copyright 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 CC_RESOURCES_RESOURCE_PROVIDER_H_
 #define CC_RESOURCES_RESOURCE_PROVIDER_H_
 
 #include <deque>
 #include <set>
 #include <string>
@@ skipping 419 matching lines @@
   void WaitSyncPointIfNeeded(ResourceId id);
 
   void WaitReadLockIfNeeded(ResourceId id);
 
   static GLint GetActiveTextureUnit(gpu::gles2::GLES2Interface* gl);
 
   OutputSurface* output_surface() { return output_surface_; }
 
   void ValidateResource(ResourceId id);
 
+  void FreeGrResources();
+
  private:
   struct Resource {
     enum Origin { INTERNAL, EXTERNAL, DELEGATED };
 
     Resource();
     ~Resource();
     Resource(unsigned texture_id,
              const gfx::Size& size,
              Origin origin,
              GLenum target,
@@ skipping 211 matching lines @@
   return format_gl_data_format[format];
 }
 
 inline GLenum GLInternalFormat(ResourceFormat format) {
   return GLDataFormat(format);
 }
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_