Make PageScaleFactor work for oopif subframes.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 95a45927753fc3a64f770e520c67a380f60e3c38..c3e6220e5f1ec88ffcd4e5828788aebf526302d7 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -758,6 +758,8 @@ bool WebContentsImpl::OnMessageReceived(RenderFrameHostImpl* render_frame_host,
     IPC_MESSAGE_HANDLER(FrameHostMsg_UpdatePageImportanceSignals,
                         OnUpdatePageImportanceSignals)
     IPC_MESSAGE_HANDLER(FrameHostMsg_Find_Reply, OnFindReply)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_RestorePageScaleFactorOnLoad,
+                        SetPageScaleFactorForSubframes)

[kenrb, 2017/01/24 17:13:27]

This message should only ever come from the top-level frame, right?

Could we move the handler to RenderFrame, which can verify that it is the
correct frame to be receiving the message, and have it call the delegate method?

[wjmaclean, 2017/01/24 18:24:26]

Sure, I'll look into doing that and include it in the next CL.

[wjmaclean, 2017/01/24 21:48:47]

Done.

 #if BUILDFLAG(ENABLE_PLUGINS)
     IPC_MESSAGE_HANDLER(FrameHostMsg_PepperInstanceCreated,
                         OnPepperInstanceCreated)
@@ -1015,6 +1017,11 @@ void WebContentsImpl::UpdateDeviceScaleFactor(double device_scale_factor) {
       new PageMsg_SetDeviceScaleFactor(MSG_ROUTING_NONE, device_scale_factor));
 }
 
+void WebContentsImpl::SetPageScaleFactorForSubframes(double page_scale_factor) {
+  SendPageMessage(
+      new PageMsg_SetPageScaleFactor(MSG_ROUTING_NONE, page_scale_factor));
+}
+
 void WebContentsImpl::GetScreenInfo(ScreenInfo* screen_info) {
   if (GetView())
     GetView()->GetScreenInfo(screen_info);