Throw exception when initialization failed.

chrome/app/android/chrome_main_delegate_android.cc

 // 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.
 
 #include "chrome/app/android/chrome_main_delegate_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 22 matching lines @@
 }
 
 int ChromeMainDelegateAndroid::RunProcess(
     const std::string& process_type,
     const content::MainFunctionParams& main_function_params) {
   if (process_type.empty()) {
     JNIEnv* env = base::android::AttachCurrentThread();
     RegisterApplicationNativeMethods(env);
 
     browser_runner_.reset(content::BrowserMainRunner::Create());
-    int exit_code = browser_runner_->Initialize(main_function_params);
-    DCHECK(exit_code < 0);
-
-    // Return 0 so that we do NOT trigger the default behavior. On Android, the
-    // UI message loop is managed by the Java application.
-    return 0;
+    return browser_runner_->Initialize(main_function_params);
   }
 
   return ChromeMainDelegate::RunProcess(process_type, main_function_params);
 }
 
 bool ChromeMainDelegateAndroid::BasicStartupComplete(int* exit_code) {
   SetChromeSpecificCommandLineFlags();
   return ChromeMainDelegate::BasicStartupComplete(exit_code);
 }
 
 bool ChromeMainDelegateAndroid::RegisterApplicationNativeMethods(JNIEnv* env) {
   if (!chrome::android::RegisterJni(env))
     return false;
 
   return base::android::RegisterNativeMethods(env,
                                               kRegistrationMethods,
                                               arraysize(kRegistrationMethods));
 }