Propagate pageScaleFactor to GuestViews

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 2e9e6d9e1622487022ead2c89b2be2086afeb901..b83951e0979c0b3cd0ebd039c20f7db0dea77a72 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -637,6 +637,8 @@ bool WebContentsImpl::OnMessageReceived(RenderViewHost* render_view_host,
                         OnDidRunInsecureContent)
     IPC_MESSAGE_HANDLER(ViewHostMsg_GoToEntryAtOffset, OnGoToEntryAtOffset)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateZoomLimits, OnUpdateZoomLimits)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_PageScaleFactorChanged,
+                        OnPageScaleFactorChanged)
     IPC_MESSAGE_HANDLER(ViewHostMsg_EnumerateDirectory, OnEnumerateDirectory)
     IPC_MESSAGE_HANDLER(FrameHostMsg_RegisterProtocolHandler,
                         OnRegisterProtocolHandler)
@@ -2622,6 +2624,10 @@ int WebContentsImpl::GetMaximumZoomPercent() const {
   return maximum_zoom_percent_;
 }
 
+void WebContentsImpl::SetPageScale(float page_scale_factor) {
+  Send(new ViewMsg_SetPageScale(GetRoutingID(), page_scale_factor));
+}
+
 void WebContentsImpl::ResetPageScale() {
   Send(new ViewMsg_ResetPageScale(GetRoutingID()));
 }
@@ -3120,6 +3126,12 @@ void WebContentsImpl::OnUpdateZoomLimits(int minimum_percent,
   maximum_zoom_percent_ = maximum_percent;
 }
 
+void WebContentsImpl::OnPageScaleFactorChanged(float page_scale_factor) {
+  FOR_EACH_OBSERVER(WebContentsObserver,
+                    observers_,
+                    OnPageScaleFactorChanged(page_scale_factor));
+}
+
 void WebContentsImpl::OnEnumerateDirectory(int request_id,
                                            const base::FilePath& path) {
   if (!delegate_)