BrowserPlugin: Grab the correct viewsize to report to BrowserPluginGuestDelegate

content/browser/browser_plugin/browser_plugin_guest.cc

Index: content/browser/browser_plugin/browser_plugin_guest.cc
diff --git a/content/browser/browser_plugin/browser_plugin_guest.cc b/content/browser/browser_plugin/browser_plugin_guest.cc
index 01b47bcacd80d6fec40eeb65a478027a85cbd7c0..f9701883548ca89e46c3bf61a0dcde29f2b565a9 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.cc
+++ b/content/browser/browser_plugin/browser_plugin_guest.cc
@@ -322,8 +322,9 @@ void BrowserPluginGuest::SwapCompositorFrame(
     return;
   }
 
-  gfx::Size view_size(frame->metadata.root_layer_size.width(),
-                      frame->metadata.root_layer_size.height());
+  cc::RenderPass* root_pass =
+      frame->delegated_frame_data->render_pass_list.back();
+  gfx::Size view_size(root_pass->output_rect.size());
   if (last_seen_view_size_ != view_size) {
     delegate_->GuestSizeChanged(last_seen_view_size_, view_size);
     last_seen_view_size_ = view_size;