Refactor CrashDump*Manager to use a shared CrashDumpObserver.

content/shell/browser/shell_browser_main_parts.cc

Index: content/shell/browser/shell_browser_main_parts.cc
diff --git a/content/shell/browser/shell_browser_main_parts.cc b/content/shell/browser/shell_browser_main_parts.cc
index ae1f590c1c146493f6d7103847874c94197915c8..1a6a96f209f9dcb46ef734ac9d1f054e08967cce 100644
--- a/content/shell/browser/shell_browser_main_parts.cc
+++ b/content/shell/browser/shell_browser_main_parts.cc
@@ -19,6 +19,7 @@
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/common/url_constants.h"
+#include "content/shell/android/shell_descriptors.h"
 #include "content/shell/browser/shell.h"
 #include "content/shell/browser/shell_access_token_store.h"
 #include "content/shell/browser/shell_browser_context.h"
@@ -37,6 +38,7 @@
 
 #if defined(OS_ANDROID)
 #include "components/crash/content/browser/crash_dump_manager_android.h"
+#include "components/crash/content/browser/crash_dump_observer_android.h"
 #include "net/android/network_change_notifier_factory_android.h"
 #include "net/base/network_change_notifier.h"
 #endif
@@ -116,6 +118,10 @@ ShellBrowserMainParts::ShellBrowserMainParts(
 
 ShellBrowserMainParts::~ShellBrowserMainParts() {
   DCHECK(!devtools_http_handler_);
+#if defined(OS_ANDROID)
+  breakpad::CrashDumpObserver::GetInstance()->UnregisterClient(
+      crash_dump_manager_.get());
+#endif
 }
 
 #if !defined(OS_MACOSX)
@@ -173,7 +179,10 @@ int ShellBrowserMainParts::PreCreateThreads() {
     base::FilePath crash_dumps_dir =
         base::CommandLine::ForCurrentProcess()->GetSwitchValuePath(
             switches::kCrashDumpsDir);
-    crash_dump_manager_.reset(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());
   }
 
   return 0;