Detect debugging target crash.

content/browser/devtools/devtools_http_handler_impl.h

Index: content/browser/devtools/devtools_http_handler_impl.h
diff --git a/content/browser/devtools/devtools_http_handler_impl.h b/content/browser/devtools/devtools_http_handler_impl.h
index f49cfd68a1b663a48474b9187393c04c2a6a8fd8..ce2688bf357e0d717adb88d8fa11245f3e2c01a9 100644
--- a/content/browser/devtools/devtools_http_handler_impl.h
+++ b/content/browser/devtools/devtools_http_handler_impl.h
@@ -15,8 +15,6 @@
 #include "content/common/content_export.h"
 #include "content/public/browser/devtools_http_handler.h"
 #include "content/public/browser/devtools_http_handler_delegate.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/worker_service.h"
 #include "net/server/http_server.h"
 
@@ -39,7 +37,6 @@ class DevToolsClientHost;
 
 class DevToolsHttpHandlerImpl
     : public DevToolsHttpHandler,
-      public NotificationObserver,
       public base::RefCountedThreadSafe<DevToolsHttpHandlerImpl>,
       public net::HttpServer::Delegate {
  private:
@@ -59,11 +56,6 @@ class DevToolsHttpHandlerImpl
       DevToolsAgentHostBinding* binding) OVERRIDE;
   virtual GURL GetFrontendURL(DevToolsAgentHost* agent_host) OVERRIDE;
 
-  // NotificationObserver implementation.
-  virtual void Observe(int type,
-                       const NotificationSource& source,
-                       const NotificationDetails& details) OVERRIDE;
-
   // net::HttpServer::Delegate implementation.
   virtual void OnHttpRequest(int connection_id,
                              const net::HttpServerRequestInfo& info) OVERRIDE;
@@ -135,7 +127,6 @@ class DevToolsHttpHandlerImpl
   scoped_ptr<DevToolsHttpHandlerDelegate> delegate_;
   DevToolsAgentHostBinding* binding_;
   scoped_ptr<DevToolsAgentHostBinding> default_binding_;
-  NotificationRegistrar registrar_;
   scoped_ptr<DevToolsBrowserTarget> browser_target_;
   DISALLOW_COPY_AND_ASSIGN(DevToolsHttpHandlerImpl);
 };