Shortcut ctrl+shift+T added on android.

chrome/browser/android/tab_android.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 "chrome/browser/android/tab_android.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
@@ skipping 79 matching lines @@
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertUTF8ToJavaString;
 using content::BrowserThread;
 using content::GlobalRequestID;
 using content::NavigationController;
 using content::WebContents;
 using navigation_interception::InterceptNavigationDelegate;
 using navigation_interception::NavigationParams;
 
-TabAndroid* TabAndroid::FromWebContents(content::WebContents* web_contents) {
-  CoreTabHelper* core_tab_helper = CoreTabHelper::FromWebContents(web_contents);
+TabAndroid* TabAndroid::FromWebContents(
+    const content::WebContents* web_contents) {

[Theresa, 2016/06/30 20:50:25]

Does this still need to be const or is this left over from earlier patchsets?

[xingliu, 2016/07/01 00:30:38]

Yes. 

+  const CoreTabHelper* core_tab_helper = CoreTabHelper::FromWebContents(
+      web_contents);
   if (!core_tab_helper)
     return NULL;
 
   CoreTabHelperDelegate* core_delegate = core_tab_helper->delegate();
   if (!core_delegate)
     return NULL;
 
   return static_cast<TabAndroid*>(core_delegate);
 }
 
@@ skipping 789 matching lines @@
 static void Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   TRACE_EVENT0("native", "TabAndroid::Init");
   // This will automatically bind to the Java object and pass ownership there.
   new TabAndroid(env, obj);
 }
 
 // static
 bool TabAndroid::RegisterTabAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }