Wire up process launch error codes.

chrome/browser/extensions/api/image_writer_private/image_writer_utility_client.cc

 // Copyright 2014 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.
 
 #include "base/bind.h"
 #include "base/location.h"
+#include "base/strings/stringprintf.h"
 #include "base/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/api/image_writer_private/image_writer_utility_client.h"
 #include "chrome/common/extensions/chrome_utility_extensions_messages.h"
 #include "chrome/grit/generated_resources.h"
 #include "content/public/browser/browser_thread.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using content::BrowserThread;
@@ skipping 85 matching lines @@
     utility_process_host_->ElevatePrivileges();
 #else
     utility_process_host_->DisableSandbox();
 #endif
     utility_process_host_->StartBatchMode();
   }
 }
 
 void ImageWriterUtilityClient::OnProcessCrashed(int exit_code) {
   task_runner_->PostTask(
-      FROM_HERE, base::Bind(error_callback_, "Utility process crashed."));
+      FROM_HERE,
+      base::Bind(error_callback_,
+                 base::StringPrintf("Utility process crashed with code %08x.",
+                                    exit_code)));
 }
 
-void ImageWriterUtilityClient::OnProcessLaunchFailed() {
+void ImageWriterUtilityClient::OnProcessLaunchFailed(int error_code) {
   task_runner_->PostTask(
-      FROM_HERE, base::Bind(error_callback_, "Process launch failed."));
+      FROM_HERE,
+      base::Bind(error_callback_,
+                 base::StringPrintf("Process launch failed with code %08x.",
+                                    error_code)));
 }
 
 bool ImageWriterUtilityClient::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ImageWriterUtilityClient, message)
   IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_ImageWriter_Succeeded,
                       OnWriteImageSucceeded)
   IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_ImageWriter_Cancelled,
                       OnWriteImageCancelled)
   IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_ImageWriter_Failed,
@@ skipping 25 matching lines @@
   if (!error_callback_.is_null()) {
     task_runner_->PostTask(FROM_HERE, base::Bind(error_callback_, message));
   }
 }
 
 void ImageWriterUtilityClient::OnWriteImageProgress(int64_t progress) {
   if (!progress_callback_.is_null()) {
     task_runner_->PostTask(FROM_HERE, base::Bind(progress_callback_, progress));
   }
 }