Remove base's implicit_cast.

android_webview/native/aw_contents.cc

 // Copyright 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 "android_webview/native/aw_contents.h"
 
 #include <limits>
 
 #include "android_webview/browser/aw_browser_context.h"
 #include "android_webview/browser/aw_browser_main_parts.h"
@@ skipping 162 matching lines @@
   return g_locale;
 }
 
 // static
 AwBrowserPermissionRequestDelegate* AwBrowserPermissionRequestDelegate::FromID(
     int render_process_id, int render_frame_id) {
   AwContents* aw_contents = AwContents::FromWebContents(
       content::WebContents::FromRenderFrameHost(
           content::RenderFrameHost::FromID(render_process_id,
                                            render_frame_id)));
-  return implicit_cast<AwBrowserPermissionRequestDelegate*>(aw_contents);
+  return aw_contents;
 }
 
 AwContents::AwContents(scoped_ptr<WebContents> web_contents)
     : web_contents_(web_contents.Pass()),
       browser_view_renderer_(
           this,
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI)),
       renderer_manager_key_(GLViewRendererManager::GetInstance()->NullKey()) {
   base::subtle::NoBarrier_AtomicIncrement(&g_instance_count, 1);
   icon_helper_.reset(new IconHelper(web_contents_.get()));
@@ skipping 1022 matching lines @@
   content::ChildProcessSecurityPolicy::GetInstance()->GrantScheme(
       web_contents_->GetRenderProcessHost()->GetID(), url::kFileScheme);
 }
 
 void SetShouldDownloadFavicons(JNIEnv* env,
                                const JavaParamRef<jclass>& jclazz) {
   g_should_download_favicons = true;
 }
 
 }  // namespace android_webview