Ensure Surface size always matches window size on swap

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 1c737ddabc5b58f20f3769546b21257a6e688cdc..9f5690974f5b1703eb8d7a5a4e4131e66f7ec141 100644
--- a/content/browser/compositor/gpu_process_transport_factory.cc
+++ b/content/browser/compositor/gpu_process_transport_factory.cc
@@ -238,6 +238,7 @@ void GpuProcessTransportFactory::EstablishedGpuChannel(
             manager, compositor->surface_id_allocator(), 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());
     data->display_client = display_client.Pass();
     compositor->SetOutputSurface(output_surface.Pass());
     return;
@@ -375,6 +376,17 @@ GpuProcessTransportFactory::CreateSurfaceIdAllocator() {
       new cc::SurfaceIdAllocator(next_surface_id_namespace_++));
 }
 
+void GpuProcessTransportFactory::ResizeDisplay(ui::Compositor* compositor,
+                                               const gfx::Size& size) {
+  PerCompositorDataMap::iterator it = per_compositor_data_.find(compositor);
+  if (it == per_compositor_data_.end())
+    return;
+  PerCompositorData* data = it->second;
+  DCHECK(data);
+  if (data->display_client)
+    data->display_client->display()->Resize(size);
+}
+
 cc::SurfaceManager* GpuProcessTransportFactory::GetSurfaceManager() {
   return surface_manager_.get();
 }