Make cross-process CALayers work on Mac

content/common/gpu/image_transport_surface_fbo_mac.cc

Index: content/common/gpu/image_transport_surface_fbo_mac.cc
diff --git a/content/common/gpu/image_transport_surface_fbo_mac.cc b/content/common/gpu/image_transport_surface_fbo_mac.cc
index db70512e2eaad0136d6c43283a0079c9df0e668d..f2138af0c0097336d431f08415189e845af31a89 100644
--- a/content/common/gpu/image_transport_surface_fbo_mac.cc
+++ b/content/common/gpu/image_transport_surface_fbo_mac.cc
@@ -135,6 +135,8 @@ bool ImageTransportSurfaceFBO::SwapBuffers() {
 
   DCHECK(!is_swap_buffers_pending_);
   is_swap_buffers_pending_ = true;
+
+  storage_provider_->WillSwapBuffers();
   return true;
 }
 
@@ -158,6 +160,8 @@ bool ImageTransportSurfaceFBO::PostSubBuffer(
 
   DCHECK(!is_swap_buffers_pending_);
   is_swap_buffers_pending_ = true;
+
+  storage_provider_->WillSwapBuffers();
   return true;
 }
 
@@ -322,7 +326,7 @@ void ImageTransportSurfaceFBO::CreateFramebuffer() {
 
   bool allocated_color_buffer = storage_provider_->AllocateColorBufferStorage(
       static_cast<CGLContextObj>(context_->GetHandle()),
-      rounded_size_);
+      rounded_size_, scale_factor_);
   if (!allocated_color_buffer) {
     DLOG(ERROR) << "Failed to allocate color buffer storage.";
     DestroyFramebuffer();