Make PageScaleFactor work for oopif subframes.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 7b5b70b4f2c14352e66aa7114a3fdb14be329f2f..7bb0c21d4186d1e4b58156d41431a14348a2dcd4 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -100,6 +100,7 @@
 #include "content/renderer/effective_connection_type_helper.h"
 #include "content/renderer/external_popup_menu.h"
 #include "content/renderer/gpu/gpu_benchmarking_extension.h"
+#include "content/renderer/gpu/render_widget_compositor.h"
 #include "content/renderer/history_controller.h"
 #include "content/renderer/history_serialization.h"
 #include "content/renderer/image_downloader/image_downloader_impl.h"
@@ -1575,6 +1576,8 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
                         OnSuppressFurtherDialogs)
     IPC_MESSAGE_HANDLER(FrameMsg_RunFileChooserResponse, OnFileChooserResponse)
     IPC_MESSAGE_HANDLER(FrameMsg_ClearFocusedElement, OnClearFocusedElement)
+    IPC_MESSAGE_HANDLER(FrameMsg_SetPageScaleFactor,
+                        OnSetPageScaleFactorForSubframe);
 #if defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(FrameMsg_ActivateNearestFindResult,
                         OnActivateNearestFindResult)
@@ -4515,6 +4518,11 @@ void RenderFrameImpl::didChangeScrollOffset(blink::WebLocalFrame* frame) {
     observer.DidChangeScrollOffset();
 }
 
+void RenderFrameImpl::didRestorePageScaleFactorOnLoad(float page_scale) {
+  // Notify the web contents so it can update cross-process frames.
+  Send(new FrameHostMsg_RestorePageScaleFactorOnLoad(routing_id_, page_scale));
+}
+
 void RenderFrameImpl::willInsertBody(blink::WebLocalFrame* frame) {
   DCHECK(!frame_ || frame_ == frame);
   if (!frame->parent()) {
@@ -6885,4 +6893,16 @@ void RenderFrameImpl::RenderWidgetWillHandleMouseEvent() {
 #endif
 }
 
+void RenderFrameImpl::OnSetPageScaleFactorForSubframe(
+    double page_scale_factor) {
+  if (is_main_frame_) {
+    NOTREACHED();
+    return;
+  }
+
+  RenderWidgetCompositor* widget_compositor = GetRenderWidget()->compositor();
+  if (widget_compositor)
+    widget_compositor->SetPageScaleFactorForSubframe(page_scale_factor);
+}
+
 }  // namespace content