Revert "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 9cc0883f4c6c49c8ecd5f46efb85cf6d6817bef1..769fcf4f1809914af4c08429e6271ae365f3e8a7 100644
--- a/android_webview/browser/aw_browser_main_parts.cc
+++ b/android_webview/browser/aw_browser_main_parts.cc
@@ -5,7 +5,6 @@
 #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_dev_tools_discovery_provider.h"
 #include "android_webview/browser/aw_result_codes.h"
@@ -21,7 +20,7 @@
 #include "base/files/file_path.h"
 #include "base/i18n/rtl.h"
 #include "base/path_service.h"
-#include "components/crash/content/browser/crash_dump_observer_android.h"
+#include "components/crash/content/browser/crash_micro_dump_manager_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"
@@ -83,8 +82,6 @@ AwBrowserMainParts::AwBrowserMainParts(AwContentBrowserClient* browser_client)
 }
 
 AwBrowserMainParts::~AwBrowserMainParts() {
-  breakpad::CrashDumpObserver::GetInstance()->UnregisterClient(
-      aw_browser_terminator_.get());
 }
 
 void AwBrowserMainParts::PreEarlyInitialization() {
@@ -122,9 +119,7 @@ int AwBrowserMainParts::PreCreateThreads() {
   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kSingleProcess)) {
     // Create the renderers crash manager on the UI thread.
-    aw_browser_terminator_ = base::MakeUnique<AwBrowserTerminator>();
-    breakpad::CrashDumpObserver::GetInstance()->RegisterClient(
-        aw_browser_terminator_.get());
+    breakpad::CrashMicroDumpManager::GetInstance();
   }
 
   return content::RESULT_CODE_NORMAL_EXIT;