Re-land: cc: Use worker context for one-copy tile initialization.

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 a6d18220786b8454cdf8339c2d339b8b2b3c7a5f..2b3a52f0aa027e66e4076df6f5d08d8a41db8a06 100644
--- a/content/browser/compositor/gpu_process_transport_factory.cc
+++ b/content/browser/compositor/gpu_process_transport_factory.cc
@@ -263,6 +263,11 @@ void GpuProcessTransportFactory::EstablishedGpuChannel(
     }
   }
 
+  scoped_refptr<ContextProviderCommandBuffer> worker_context_provider(
+      ContextProviderCommandBuffer::Create(
+          GpuProcessTransportFactory::CreateOffscreenCommandBufferContext(),
+          BROWSER_WORKER_CONTEXT));
+
   scoped_ptr<BrowserCompositorOutputSurface> surface;
   if (!create_gpu_output_surface) {
     surface = make_scoped_ptr(new SoftwareBrowserCompositorOutputSurface(
@@ -279,12 +284,14 @@ void GpuProcessTransportFactory::EstablishedGpuChannel(
     } else if (capabilities.gpu.surfaceless) {
       surface =
           make_scoped_ptr(new GpuSurfacelessBrowserCompositorOutputSurface(
-              context_provider, data->surface_id, compositor->vsync_manager(),
+              context_provider, worker_context_provider, data->surface_id,
+              compositor->vsync_manager(),
               CreateOverlayCandidateValidator(compositor->widget()),
               GL_TEXTURE_2D, GL_RGB, BrowserGpuMemoryBufferManager::current()));
     } else {
       surface = make_scoped_ptr(new GpuBrowserCompositorOutputSurface(
-          context_provider, compositor->vsync_manager(),
+          context_provider, worker_context_provider,
+          compositor->vsync_manager(),
           CreateOverlayCandidateValidator(compositor->widget())));
     }
   }
@@ -314,7 +321,8 @@ void GpuProcessTransportFactory::EstablishedGpuChannel(
 
   scoped_ptr<cc::SurfaceDisplayOutputSurface> output_surface(
       new cc::SurfaceDisplayOutputSurface(
-          manager, compositor->surface_id_allocator(), context_provider));
+          manager, compositor->surface_id_allocator(), context_provider,
+          worker_context_provider));
   display_client->set_surface_output_surface(output_surface.get());
   output_surface->set_display_client(display_client.get());
   display_client->display()->Resize(compositor->size());