[Extensions] Small cleanup of extension_install_prompt.*

chrome/browser/extensions/extension_install_prompt_unittest.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 <stddef.h>
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/macros.h"
@@ skipping 12 matching lines @@
 #include "extensions/common/extension_builder.h"
 #include "extensions/common/feature_switch.h"
 #include "extensions/common/manifest_handlers/icons_handler.h"
 #include "extensions/common/permissions/api_permission.h"
 #include "extensions/common/permissions/api_permission_set.h"
 #include "extensions/common/permissions/manifest_permission_set.h"
 #include "extensions/common/permissions/permission_set.h"
 #include "extensions/common/url_pattern_set.h"
 #include "extensions/common/value_builder.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/skia_util.h"
 
 namespace extensions {
 
 namespace {
 
 void VerifyPromptIconCallback(
     const base::Closure& quit_closure,
     const SkBitmap& expected_bitmap,
     ExtensionInstallPromptShowParams* params,
@@ skipping 192 matching lines @@
     prompt.ShowDialog(ExtensionInstallPrompt::DoneCallback(),
                       extension,
                       app_icon.bitmap(),  // Use a different icon.
                       base::Bind(&VerifyPromptIconCallback,
                                  run_loop.QuitClosure(), *app_icon.bitmap()));
     run_loop.Run();
   }
 }
 
 }  // namespace extensions