Switch all contexts in a share group to be on the same screen as the window they present to.

content/common/gpu/image_transport_surface_mac.cc

 // Copyright (c) 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.
 
 #include "content/common/gpu/image_transport_surface.h"
 
 #include "base/mac/scoped_cftyperef.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/common/gpu/texture_image_transport_surface.h"
@@ skipping 252 matching lines @@
   extensions += "GL_CHROMIUM_front_buffer_cached ";
   extensions += "GL_CHROMIUM_post_sub_buffer";
   return extensions;
 }
 
 gfx::Size IOSurfaceImageTransportSurface::GetSize() {
   return size_;
 }
 
 void IOSurfaceImageTransportSurface::OnBufferPresented(
-    const AcceleratedSurfaceMsg_BufferPresented_Params& /* params */) {
+    const AcceleratedSurfaceMsg_BufferPresented_Params& params) {
   DCHECK(is_swap_buffers_pending_);
+
+  context_->share_group()->SetRendererID(params.renderer_id);
   is_swap_buffers_pending_ = false;
   if (did_unschedule_) {
     did_unschedule_ = false;
     helper_->SetScheduled(true);
   }
 }
 
 void IOSurfaceImageTransportSurface::OnResizeViewACK() {
   NOTREACHED();
 }
@@ skipping 189 matching lines @@
   else
     return NULL;
 }
 
 // static
 void ImageTransportSurface::SetAllowOSMesaForTesting(bool allow) {
   g_allow_os_mesa = allow;
 }
 
 }  // namespace content