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

content/renderer/gpu/renderer_gl_context.cc

Index: content/renderer/gpu/renderer_gl_context.cc
diff --git a/content/renderer/gpu/renderer_gl_context.cc b/content/renderer/gpu/renderer_gl_context.cc
index 994f0853fcf493539c09f81d7443847be133aeec..97b100fa56710db2eeb2e944f94747c715befe30 100644
--- a/content/renderer/gpu/renderer_gl_context.cc
+++ b/content/renderer/gpu/renderer_gl_context.cc
@@ -266,6 +266,10 @@ CommandBufferProxy* RendererGLContext::GetCommandBufferProxy() {
   return command_buffer_;
 }
 
+bool RendererGLContext::SetSurfaceVisible(bool visible) {
+  return GetCommandBufferProxy()->SetSurfaceVisible(visible);
+}
+
 // TODO(gman): Remove This
 void RendererGLContext::DisableShaderTranslation() {
   NOTREACHED();