Fail all started requests if the utility process crashes or fails to start.

chrome/browser/image_decoder.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_IMAGE_DECODER_H_
 #define CHROME_BROWSER_IMAGE_DECODER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 99 matching lines @@
 
   // Starts UtilityProcessHost in batch mode and starts |batch_mode_timer_|.
   // If the utility process fails to start, the method resets
   // |utility_process_host_| and returns.
   void StartBatchMode();
 
   // Stops batch mode if no requests have come in since
   // |kBatchModeTimeoutSeconds|.
   void StopBatchMode();
 
+  // Fails all outstanding requests.
+  void FailAllRequests();
+
   // Overidden from UtilityProcessHostClient.
+  void OnProcessCrashed(int exit_code) override;
+  void OnProcessLaunchFailed() override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
   // IPC message handlers.
   void OnDecodeImageSucceeded(const SkBitmap& decoded_image, int request_id);
   void OnDecodeImageFailed(int request_id);
 
   // For the ImageRequest identified by |request_id|, call its OnImageDecoded()
   // or OnDecodeImageFailed() method on its task runner thread.
   void RunOnImageDecoded(const SkBitmap& decoded_image, int request_id);
   void RunOnDecodeImageFailed(int request_id);
@@ skipping 11 matching lines @@
   base::WeakPtr<content::UtilityProcessHost> utility_process_host_;
 
   // Calls StopBatchMode() after |kBatchModeTimeoutSeconds| have elapsed,
   // unless a new decoding request resets the timer.
   scoped_ptr<base::DelayTimer<ImageDecoder>> batch_mode_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageDecoder);
 };
 
 #endif  // CHROME_BROWSER_IMAGE_DECODER_H_