Provide real GPUSupport to ash for Chrome

ash/shell/shell_delegate_impl.cc

Index: ash/shell/shell_delegate_impl.cc
diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index 20e8fde871a1f51176dd950ed38647e2760bc874..2a573ac9cc077d02240883797e8ea2c5cce91fe0 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -8,6 +8,7 @@
 #include "ash/caps_lock_delegate_stub.h"
 #include "ash/default_accessibility_delegate.h"
 #include "ash/default_user_wallpaper_delegate.h"
+#include "ash/gpu_support_stub.h"
 #include "ash/host/root_window_host_factory.h"
 #include "ash/media_delegate.h"
 #include "ash/new_window_delegate.h"
@@ -169,6 +170,11 @@ WindowTreeHostFactory* ShellDelegateImpl::CreateWindowTreeHostFactory() {
   return WindowTreeHostFactory::Create();
 }
 
+GPUSupport* ShellDelegateImpl::CreateGPUSupport() {
+  // Real GPU support depends on src/content, so just use a stub.
+  return new GPUSupportStub;
+}
+
 base::string16 ShellDelegateImpl::GetProductName() const {
   return base::string16();
 }