(not for commit) Create 2nd ContextProvider for Ganesh rasterization.

content/browser/compositor/surface_display_output_surface.h

Index: content/browser/compositor/surface_display_output_surface.h
diff --git a/content/browser/compositor/surface_display_output_surface.h b/content/browser/compositor/surface_display_output_surface.h
index 670aea7a7e1a5f5f1cc0e65be457cdc0ed69bf8d..57727b6aae328d628fc584f3fcded7ecf105ea43 100644
--- a/content/browser/compositor/surface_display_output_surface.h
+++ b/content/browser/compositor/surface_display_output_surface.h
@@ -28,7 +28,8 @@ class SurfaceDisplayOutputSurface : public cc::OutputSurface,
   SurfaceDisplayOutputSurface(
       cc::SurfaceManager* surface_manager,
       cc::SurfaceIdAllocator* allocator,
-      const scoped_refptr<cc::ContextProvider>& context_provider);
+      const scoped_refptr<cc::ContextProvider>& context_provider,
+      const scoped_refptr<cc::ContextProvider>& worker_context_provider);
   ~SurfaceDisplayOutputSurface() override;
 
   void set_display_client(OnscreenDisplayClient* display_client) {