Refactor CrashDump*Manager to use a shared CrashDumpObserver singleton.

chromecast/browser/cast_browser_main_parts.cc

Index: chromecast/browser/cast_browser_main_parts.cc
diff --git a/chromecast/browser/cast_browser_main_parts.cc b/chromecast/browser/cast_browser_main_parts.cc
index d098b063e22e7e5eed15cac013c518ba6368119a..98c9dbe4577e68c09ea670b36a63d5835e3ac83f 100644
--- a/chromecast/browser/cast_browser_main_parts.cc
+++ b/chromecast/browser/cast_browser_main_parts.cc
@@ -40,6 +40,7 @@
 #include "chromecast/browser/pref_service_helper.h"
 #include "chromecast/browser/url_request_context_factory.h"
 #include "chromecast/chromecast_features.h"
+#include "chromecast/common/global_descriptors.h"
 #include "chromecast/common/platform_client_auth.h"
 #include "chromecast/media/base/key_systems_common.h"
 #include "chromecast/media/base/media_resource_tracker.h"
@@ -297,7 +298,7 @@ CastBrowserMainParts::~CastBrowserMainParts() {
     media_thread_->task_runner()->DeleteSoon(
         FROM_HERE, media_pipeline_backend_manager_.release());
   }
-#endif  // !defined(OS_ANDROID)
+#endif  // defined(OS_ANDROID)
 }
 
 scoped_refptr<base::SingleThreadTaskRunner>
@@ -390,8 +391,10 @@ int CastBrowserMainParts::PreCreateThreads() {
   if (!chromecast::CrashHandler::GetCrashDumpLocation(&crash_dumps_dir)) {
     LOG(ERROR) << "Could not find crash dump location.";
   }
-  cast_browser_process_->SetCrashDumpManager(
-      base::MakeUnique<breakpad::CrashDumpManager>(crash_dumps_dir));
+  breakpad::CrashDumpObserver::Create();
+  breakpad::CrashDumpObserver::GetInstance()->RegisterClient(
+      base::MakeUnique<breakpad::CrashDumpManager>(crash_dumps_dir,
+                                                   kAndroidMinidumpDescriptor));
 #else
   base::FilePath home_dir;
   CHECK(PathService::Get(DIR_CAST_HOME, &home_dir));