[Master/Overview CL] Make PageScaleFactor work for oopif subframe.

content/browser/renderer_host/render_widget_host_view_base.cc

Index: content/browser/renderer_host/render_widget_host_view_base.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_base.cc b/content/browser/renderer_host/render_widget_host_view_base.cc
index 28b36981dba2dc16bff3546c10449e317efb8cbb..eec2e0ed724445364d6cf51cbed9e4c1677564fb 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.cc
+++ b/content/browser/renderer_host/render_widget_host_view_base.cc
@@ -296,6 +296,14 @@ void RenderWidgetHostViewBase::DidUnregisterFromTextInputManager(
   text_input_manager_ = nullptr;
 }
 
+void RenderWidgetHostViewBase::UpdatePageScaleFactor(float page_scale) {
+  RenderWidgetHostImpl* host =
+      RenderWidgetHostImpl::From(GetRenderWidgetHost());
+
+  if (host && host->delegate())
+    host->delegate()->UpdatePageScaleFactor(page_scale);
+}
+
 base::WeakPtr<RenderWidgetHostViewBase> RenderWidgetHostViewBase::GetWeakPtr() {
   return weak_factory_.GetWeakPtr();
 }