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

content/common/gpu/image_transport_surface_linux.cc

Index: content/common/gpu/image_transport_surface_linux.cc
diff --git a/content/common/gpu/image_transport_surface_linux.cc b/content/common/gpu/image_transport_surface_linux.cc
index 079294f2bcdcc833edb527e8a9d3e92dd1985673..f003b5efa6cc4bff3b0896acfe86c292d034da10 100644
--- a/content/common/gpu/image_transport_surface_linux.cc
+++ b/content/common/gpu/image_transport_surface_linux.cc
@@ -69,6 +69,7 @@ class EGLImageTransportSurface : public ImageTransportSurface,
   virtual gfx::Size GetSize() OVERRIDE;
   virtual void OnMakeCurrent(gfx::GLContext* context) OVERRIDE;
   virtual unsigned int GetBackingFrameBufferObject() OVERRIDE;
+  virtual void SetVisible(bool visible) OVERRIDE;
 
  protected:
   // ImageTransportSurface implementation
@@ -270,6 +271,15 @@ unsigned int EGLImageTransportSurface::GetBackingFrameBufferObject() {
   return fbo_id_;
 }
 
+void EGLImageTransportSurface::SetVisible(bool visible) {
+  if (!visible && back_surface_.get() && front_surface_.get()) {
+    ReleaseSurface(&back_surface_);
+  } else if (visible && !back_surface_.get() && front_surface_.get()) {
+    // Leverage the OnResize hook because it does exactly what we want
+    OnResize(front_surface_->size());
+  }
+}
+
 void EGLImageTransportSurface::ReleaseSurface(
     scoped_refptr<EGLAcceleratedSurface>* surface) {
   if (surface->get()) {