Refactor CrashDump*Manager to use a shared CrashDumpObserver.

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 2849dfdbbc95cc875a00704422a88d961a6b3208..9c9afdd42612563a323b4aed68db4bd10ce7c97f 100644
--- a/chromecast/browser/cast_browser_main_parts.cc
+++ b/chromecast/browser/cast_browser_main_parts.cc
@@ -38,6 +38,7 @@
 #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"
@@ -292,6 +293,9 @@ CastBrowserMainParts::~CastBrowserMainParts() {
     media_thread_->task_runner()->DeleteSoon(
         FROM_HERE, media_pipeline_backend_manager_.release());
   }
+#else
+  breakpad::CrashDumpObserver::GetInstance()->UnregisterClient(
+      crash_dump_manager_.get());
 #endif  // !defined(OS_ANDROID)
 }
 
@@ -378,8 +382,10 @@ int CastBrowserMainParts::PreCreateThreads() {
   if (!chromecast::CrashHandler::GetCrashDumpLocation(&crash_dumps_dir)) {
     LOG(ERROR) << "Could not find crash dump location.";
   }
-  cast_browser_process_->SetCrashDumpManager(
-      base::WrapUnique(new breakpad::CrashDumpManager(crash_dumps_dir)));
+  crash_dump_manager_ = base::MakeUnique<breakpad::CrashDumpManager>(
+      crash_dumps_dir, kAndroidMinidumpDescriptor);
+  breakpad::CrashDumpObserver::GetInstance()->RegisterClient(
+      crash_dump_manager_.get());
 #else
   base::FilePath home_dir;
   CHECK(PathService::Get(DIR_CAST_HOME, &home_dir));