Make channel preemption not require view contexts for hookup

content/browser/compositor/gpu_process_transport_factory.cc

Index: content/browser/compositor/gpu_process_transport_factory.cc
diff --git a/content/browser/compositor/gpu_process_transport_factory.cc b/content/browser/compositor/gpu_process_transport_factory.cc
index a5b14336ab766d262cf57c47b317d497ab7b1980..6ad21d8881f9fafa1beff0ddbb7f9f6a798b0c58 100644
--- a/content/browser/compositor/gpu_process_transport_factory.cc
+++ b/content/browser/compositor/gpu_process_transport_factory.cc
@@ -442,14 +442,6 @@ ui::ContextFactory* GpuProcessTransportFactory::GetContextFactory() {
   return this;
 }
 
-gfx::GLSurfaceHandle GpuProcessTransportFactory::GetSharedSurfaceHandle() {
-  gfx::GLSurfaceHandle handle = gfx::GLSurfaceHandle(
-      gfx::kNullPluginWindow, gfx::NULL_TRANSPORT);
-  handle.parent_client_id =
-      BrowserGpuChannelHostFactory::instance()->GetGpuChannelId();
-  return handle;
-}
-
 scoped_ptr<cc::SurfaceIdAllocator>
 GpuProcessTransportFactory::CreateSurfaceIdAllocator() {
   scoped_ptr<cc::SurfaceIdAllocator> allocator =
@@ -564,8 +556,17 @@ GpuProcessTransportFactory::CreatePerCompositorData(
     data->surface_id = 0;
   } else {
     data->surface_id = tracker->AddSurfaceForNativeWidget(widget);
+#if defined(OS_MACOSX)

[no sievers, 2015/09/23 21:53:21]

While you're at it and are cleaning up the types, mind putting '||
(OS_ANDROID)'? :)
crbug.com/507792

[piman, 2015/09/23 23:33:37]

Yes, good point, done.

+    // On Mac, we can't pass the AcceleratedWidget, which is process-local, so
+    // instead we pass the surface_id, so that we can look up the
+    // AcceleratedWidget when we receive
+    // GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params.
+    gfx::PluginWindowHandle handle = data->surface_id;
+#else
+    gfx::PluginWindowHandle handle = widget;
+#endif
     tracker->SetSurfaceHandle(data->surface_id,
-                              gfx::GLSurfaceHandle(widget, gfx::NATIVE_DIRECT));
+                              gfx::GLSurfaceHandle(handle, gfx::NATIVE_DIRECT));
   }
 
   per_compositor_data_[compositor] = data;