Refactor CrashDump*Manager to use a shared CrashDumpObserver singleton.

chromecast/browser/cast_browser_process.cc

Index: chromecast/browser/cast_browser_process.cc
diff --git a/chromecast/browser/cast_browser_process.cc b/chromecast/browser/cast_browser_process.cc
index cf7101aab315a05cd2c52005d003c15de9ff24af..61a91e84992b5568de0e3704d9f388ea302351fd 100644
--- a/chromecast/browser/cast_browser_process.cc
+++ b/chromecast/browser/cast_browser_process.cc
@@ -108,14 +108,6 @@ void CastBrowserProcess::SetResourceDispatcherHostDelegate(
   resource_dispatcher_host_delegate_.swap(delegate);
 }
 
-#if defined(OS_ANDROID)
-void CastBrowserProcess::SetCrashDumpManager(
-    std::unique_ptr<breakpad::CrashDumpManager> crash_dump_manager) {
-  DCHECK(!crash_dump_manager_);
-  crash_dump_manager_.swap(crash_dump_manager);
-}
-#endif  // defined(OS_ANDROID)
-
 void CastBrowserProcess::SetConnectivityChecker(
     scoped_refptr<ConnectivityChecker> connectivity_checker) {
   DCHECK(!connectivity_checker_);