Move RequestPpapiBrokerPermission from WebContentsObserver to WebContentsDelegate.

content/public/browser/web_contents_observer.h

Index: content/public/browser/web_contents_observer.h
diff --git a/content/public/browser/web_contents_observer.h b/content/public/browser/web_contents_observer.h
index 93565da511af756481180689f9350f764db9336c..14c7e7742955310b185a8f289ad54293ec5ab0c0 100644
--- a/content/public/browser/web_contents_observer.h
+++ b/content/public/browser/web_contents_observer.h
@@ -5,7 +5,6 @@
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 
-#include "base/callback_forward.h"
 #include "base/process_util.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/navigation_controller.h"
@@ -138,18 +137,6 @@ class CONTENT_EXPORT WebContentsObserver : public IPC::Listener,
   // Called when the user agent override for a WebContents has been changed.
   virtual void UserAgentOverrideSet(const std::string& user_agent) {}
 
-  // Requests permission to access the PPAPI broker. If the object handles the
-  // request, it should return true and eventually call the passed in |callback|
-  // with the result. Otherwise it should return false, in which case the next
-  // observer will be called.
-  // Implementations should make sure not to call the callback after the
-  // WebContents has been destroyed.
-  virtual bool RequestPpapiBrokerPermission(
-      WebContents* web_contents,
-      const GURL& url,
-      const FilePath& plugin_path,
-      const base::Callback<void(bool)>& callback);
-
   // Indicates that client 3D APIs (Pepper 3D, WebGL) were just
   // blocked on the current page, specifically because the GPU was
   // reset recently.