Shortcut ctrl+shift+T added on android.

chrome/browser/android/recently_closed_tabs_bridge.cc

 // Copyright 2013 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/recently_closed_tabs_bridge.h"
 
 #include "base/android/jni_string.h"
 #include "chrome/browser/android/tab_android.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_android.h"
 #include "chrome/browser/sessions/session_restore.h"
 #include "chrome/browser/sessions/tab_restore_service_factory.h"
+#include "chrome/browser/ui/android/tab_model/tab_model_list.h"
+#include "components/sessions/core/live_tab.h"
 #include "components/sessions/core/tab_restore_service.h"
 #include "content/public/browser/web_contents.h"
 #include "jni/RecentlyClosedBridge_jni.h"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertUTF16ToJavaString;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::ScopedJavaLocalRef;
 
 namespace {
@@ skipping 96 matching lines @@
   session_tab.navigations = tab_entry->navigations;
 
   WindowOpenDisposition disposition =
       static_cast<WindowOpenDisposition>(j_disposition);
   SessionRestore::RestoreForeignSessionTab(web_contents,
                                            session_tab,
                                            disposition);
   return true;
 }
 
+jboolean RecentlyClosedTabsBridge::OpenMostRecentlyClosedTab(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj) {
+  EnsureTabRestoreService();
+  if (!tab_restore_service_ || TabModelList::empty() ||
+      tab_restore_service_->entries().empty())
+    return false;
+
+  // Passing nullptr here because LiveTabContext will be determined later by
+  // a call to AndroidLiveTabContext.

[Theresa, 2016/07/12 17:25:17]

s/AndroidLiveTabContext/AndroidLiveTabContext::FindLiveTabContextWithID

+  std::vector<sessions::LiveTab*> restored_tab =
+      tab_restore_service_->RestoreMostRecentEntry(nullptr);
+
+  return restored_tab.empty() ? false : true;
+}
+
 void RecentlyClosedTabsBridge::ClearRecentlyClosedTabs(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj) {
   EnsureTabRestoreService();
   if (tab_restore_service_)
     tab_restore_service_->ClearEntries();
 }
 
 void RecentlyClosedTabsBridge::TabRestoreServiceChanged(
     sessions::TabRestoreService* service) {
@@ skipping 29 matching lines @@
                   const JavaParamRef<jobject>& jprofile) {
   RecentlyClosedTabsBridge* bridge = new RecentlyClosedTabsBridge(
       ProfileAndroid::FromProfileAndroid(jprofile));
   return reinterpret_cast<intptr_t>(bridge);
 }
 
 // static
 bool RecentlyClosedTabsBridge::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }