Command to mark surface inactive, so gpu process can release resources.

content/renderer/gpu/renderer_gl_context.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.
 
 // This API is consistent with other OpenGL setup APIs like window's WGL
 // and pepper's PGL. This API is used to manage OpenGL RendererGLContexts in the
 // Chrome renderer process in a way that is consistent with other platforms.
 
 #ifndef CONTENT_RENDERER_GPU_RENDERER_GL_CONTEXT_H_
 #define CONTENT_RENDERER_GPU_RENDERER_GL_CONTEXT_H_
@@ skipping 142 matching lines @@
   // For a view RendererGLContext, display everything that has been rendered
   // since the last call. For an offscreen RendererGLContext, resolve everything
   // that has been rendered since the last call to a copy that can be accessed
   // by the parent RendererGLContext.
   bool SwapBuffers();
 
   // Run the task once the channel has been flushed. Takes care of deleting the
   // task whether the echo succeeds or not.
   bool Echo(const base::Closure& task);
 
+  // Sends an IPC message with the new state of surface visibility
+  bool SetSurfaceVisible(bool visibility);
+
   // Create a TransportTextureHost object associated with the context.
   scoped_refptr<TransportTextureHost> CreateTransportTextureHost();
 
   // TODO(gman): Remove this
   void DisableShaderTranslation();
 
   // Allows direct access to the GLES2 implementation so a RendererGLContext
   // can be used without making it current.
   gpu::gles2::GLES2Implementation* GetImplementation();
 
@@ skipping 29 matching lines @@
   gpu::gles2::GLES2CmdHelper* gles2_helper_;
   int32 transfer_buffer_id_;
   gpu::gles2::GLES2Implementation* gles2_implementation_;
   Error last_error_;
   int frame_number_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererGLContext);
 };
 
 #endif  // CONTENT_RENDERER_GPU_RENDERER_GL_CONTEXT_H_