Refactor CrashDump*Manager to use a shared CrashDumpObserver singleton.

android_webview/browser/aw_browser_main_parts.cc

Index: android_webview/browser/aw_browser_main_parts.cc
diff --git a/android_webview/browser/aw_browser_main_parts.cc b/android_webview/browser/aw_browser_main_parts.cc
index bfb81d87d1e15995b2ed65d59d6d45ef15a12bc3..9ef01d0e9e5c7bba7c4efbe472a2fd21f43628d4 100644
--- a/android_webview/browser/aw_browser_main_parts.cc
+++ b/android_webview/browser/aw_browser_main_parts.cc
@@ -5,6 +5,7 @@
 #include "android_webview/browser/aw_browser_main_parts.h"
 
 #include "android_webview/browser/aw_browser_context.h"
+#include "android_webview/browser/aw_browser_terminator.h"
 #include "android_webview/browser/aw_content_browser_client.h"
 #include "android_webview/browser/aw_result_codes.h"
 #include "android_webview/browser/deferred_gpu_command_service.h"
@@ -19,7 +20,7 @@
 #include "base/files/file_path.h"
 #include "base/i18n/rtl.h"
 #include "base/path_service.h"
-#include "components/crash/content/browser/crash_micro_dump_manager_android.h"
+#include "components/crash/content/browser/crash_dump_observer_android.h"
 #include "content/public/browser/android/synchronous_compositor.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
@@ -114,10 +115,12 @@ int AwBrowserMainParts::PreCreateThreads() {
   base::android::MemoryPressureListenerAndroid::RegisterSystemCallback(
       base::android::AttachCurrentThread());
   DeferredGpuCommandService::SetInstance();
+  breakpad::CrashDumpObserver::Create();
   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kSingleProcess)) {
     // Create the renderers crash manager on the UI thread.
-    breakpad::CrashMicroDumpManager::GetInstance();
+    breakpad::CrashDumpObserver::GetInstance()->RegisterClient(
+        base::MakeUnique<AwBrowserTerminator>());
   }
 
   return content::RESULT_CODE_NORMAL_EXIT;