Revert "Refactor CrashDump*Manager to use a shared CrashDumpObserver singleton."

chromecast/browser/cast_browser_main_parts.h

Index: chromecast/browser/cast_browser_main_parts.h
diff --git a/chromecast/browser/cast_browser_main_parts.h b/chromecast/browser/cast_browser_main_parts.h
index 03aa1c0a7bce6f6e058f9e235000a97d9eeae10f..d60960472b4ea21bd601075112f6ed06c70f17d9 100644
--- a/chromecast/browser/cast_browser_main_parts.h
+++ b/chromecast/browser/cast_browser_main_parts.h
@@ -17,12 +17,6 @@ class SingleThreadTaskRunner;
 class Thread;
 }  // namespace base
 
-#if defined(OS_ANDROID)
-namespace breakpad {
-class CrashDumpManager;
-}
-#endif
-
 namespace net {
 class NetLog;
 }
@@ -88,10 +82,6 @@ class CastBrowserMainParts : public content::BrowserMainParts {
   std::unique_ptr<CastMemoryPressureMonitor> memory_pressure_monitor_;
 #endif
 
-#if defined(OS_ANDROID)
-  std::unique_ptr<breakpad::CrashDumpManager> crash_dump_manager_;
-#endif
-
   DISALLOW_COPY_AND_ASSIGN(CastBrowserMainParts);
 };