Track where WebContents are created in order to better understand issue.

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 <set>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
+#include "base/debug/stack_trace.h"
 #include "base/files/file_path.h"
 #include "base/process/kill.h"
 #include "base/strings/string16.h"
 #include "base/supports_user_data.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/invalidate_type.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/page_navigator.h"
 #include "content/public/browser/save_page_type.h"
 #include "content/public/browser/web_ui.h"
@@ skipping 648 matching lines @@
   // Requests the renderer to exit fullscreen.
   virtual void ExitFullscreen() = 0;
 
   // Unblocks requests from renderer for a newly created window. This is
   // used in showCreatedWindow() or sometimes later in cases where
   // delegate->ShouldResumeRequestsForCreatedWindow() indicated the requests
   // should not yet be resumed. Then the client is responsible for calling this
   // as soon as they are ready.
   virtual void ResumeLoadingCreatedWebContents() = 0;
 
+  // Temporary to track down http://crbug.com/538612
+  virtual base::debug::StackTrace stack_trace() = 0;
+
 #if defined(OS_ANDROID)
   // 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(USE_AURA)
   CONTENT_EXPORT static WebContents* FromJavaWebContents(
       jobject jweb_contents_android);
@@ skipping 10 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class WebContentsImpl;
   WebContents() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_