Shortcut ctrl+shift+T added on android.

chrome/browser/android/tab_android.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 
 #include <jni.h>
 #include <stdint.h>
 
@@ skipping 56 matching lines @@
   // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.chrome.browser
   enum TabLoadStatus {
     PAGE_LOAD_FAILED = 0,
     DEFAULT_PAGE_LOAD = 1,
     PARTIAL_PRERENDERED_PAGE_LOAD = 2,
     FULL_PRERENDERED_PAGE_LOAD = 3,
   };
 
   // Convenience method to retrieve the Tab associated with the passed
   // WebContents.  Can return NULL.
-  static TabAndroid* FromWebContents(content::WebContents* web_contents);
+  static TabAndroid* FromWebContents(const content::WebContents* web_contents);
 
   // Returns the native TabAndroid stored in the Java Tab represented by
   // |obj|.
   static TabAndroid* GetNativeTab(JNIEnv* env, jobject obj);
 
   // Function to attach helpers to the contentView.
   static void AttachTabHelpers(content::WebContents* web_contents);
 
   TabAndroid(JNIEnv* env, jobject obj);
   ~TabAndroid() override;
 
   base::android::ScopedJavaLocalRef<jobject> GetJavaObject();
 
   // Return the WebContents, if any, currently owned by this TabAndroid.
   content::WebContents* web_contents() const { return web_contents_.get(); }
 
   // Return the cc::Layer that represents the content for this TabAndroid.
   scoped_refptr<cc::Layer> GetContentLayer() const;
 
   // Return specific id information regarding this TabAndroid.
   const SessionID& session_id() const { return session_tab_id_; }
+  const SessionID& window_id() const { return session_window_id_; }
+
   int GetAndroidId() const;
   int GetSyncId() const;
 
   // Return the tab title.
   base::string16 GetTitle() const;
 
   // Return the tab url.
   GURL GetURL() const;
 
   // Load the tab if it was unloaded from memory.
@@ skipping 173 matching lines @@
   std::unique_ptr<content::WebContents> web_contents_;
   std::unique_ptr<chrome::android::TabWebContentsDelegateAndroid>
       web_contents_delegate_;
 
   std::unique_ptr<browser_sync::SyncedTabDelegateAndroid> synced_tab_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(TabAndroid);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_TAB_ANDROID_H_