Pass JavaRef to WebContents::FromJavaWebContents.

content/public/browser/web_contents.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 
 #include <stdint.h>
 
 #include <set>
@@ skipping 693 matching lines @@
 
   // Requests to resume the current media session.
   virtual void ResumeMediaSession() = 0;
   // Requests to suspend the current media session.
   virtual void SuspendMediaSession() = 0;
   // Requests to stop the current media session.
   virtual void StopMediaSession() = 0;
 
 #if defined(OS_ANDROID)
   CONTENT_EXPORT static WebContents* FromJavaWebContents(
-      jobject jweb_contents_android);
+      const base::android::JavaRef<jobject>& jweb_contents_android);
   virtual base::android::ScopedJavaLocalRef<jobject> GetJavaWebContents() = 0;
 
   // Selects and zooms to the find result nearest to the point (x,y) defined in
   // find-in-page coordinates.
   virtual void ActivateNearestFindResult(float x, float y) = 0;
 
   // Requests the rects of the current find matches from the renderer
   // process. |current_version| is the version of find rects that the caller
   // already knows about. This version will be compared to the current find
   // rects version in the renderer process (which is updated whenever the rects
@@ skipping 13 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class WebContentsImpl;
   WebContents() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_