<webview>: Support zoom in WebUI

content/browser/browser_plugin/browser_plugin_embedder.h

Index: content/browser/browser_plugin/browser_plugin_embedder.h
diff --git a/content/browser/browser_plugin/browser_plugin_embedder.h b/content/browser/browser_plugin/browser_plugin_embedder.h
index 737a19edd18daf40920b9c74b817383beb40e492..107fa618686bea84da907e14f2e04356cfbd01a4 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder.h
+++ b/content/browser/browser_plugin/browser_plugin_embedder.h
@@ -67,6 +67,9 @@ class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver {
     factory_ = factory;
   }
 
+  // Sets the zoom level for all guests within this embedder.
+  void SetZoomLevel(double level);
+
   // WebContentsObserver implementation.
   virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
@@ -100,6 +103,8 @@ class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver {
 
   bool DidSendScreenRectsCallback(BrowserPluginGuest* guest);
 
+  bool SetZoomLevelCallback(double level, BrowserPluginGuest* guest);
+
   bool UnlockMouseIfNecessaryCallback(const NativeWebKeyboardEvent& event,
                                       BrowserPluginGuest* guest);