Refactor CrashDump*Manager to use a shared CrashDumpObserver singleton.

content/shell/browser/shell_browser_main_parts.h

 // Copyright 2013 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_SHELL_BROWSER_SHELL_BROWSER_MAIN_PARTS_H_
 #define CONTENT_SHELL_BROWSER_SHELL_BROWSER_MAIN_PARTS_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 43 matching lines @@
   virtual void InitializeMessageLoopContext();
 
   void set_browser_context(ShellBrowserContext* context) {
     browser_context_.reset(context);
   }
   void set_off_the_record_browser_context(ShellBrowserContext* context) {
     off_the_record_browser_context_.reset(context);
   }
 
  private:
-#if defined(OS_ANDROID)
-  std::unique_ptr<breakpad::CrashDumpManager> crash_dump_manager_;
-#endif
   std::unique_ptr<net::NetLog> net_log_;
   std::unique_ptr<ShellBrowserContext> browser_context_;
   std::unique_ptr<ShellBrowserContext> off_the_record_browser_context_;
 
   // For running content_browsertests.
   const MainFunctionParams parameters_;
   bool run_message_loop_;
 
+#if defined(OS_ANDROID)
+  scoped_refptr<breakpad::CrashDumpManager> crash_dump_manager_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(ShellBrowserMainParts);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_BROWSER_SHELL_BROWSER_MAIN_PARTS_H_