Shortcut ctrl+shift+T added on android.

chrome/browser/android/recently_closed_tabs_bridge.cc

Index: chrome/browser/android/recently_closed_tabs_bridge.cc
diff --git a/chrome/browser/android/recently_closed_tabs_bridge.cc b/chrome/browser/android/recently_closed_tabs_bridge.cc
index 771c815e70b9b7e507f46b5ea43618d09bc9e015..b063b0f25d14581ac082d7145f7461544ba449f4 100644
--- a/chrome/browser/android/recently_closed_tabs_bridge.cc
+++ b/chrome/browser/android/recently_closed_tabs_bridge.cc
@@ -10,6 +10,7 @@
 #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/tab_restore_service.h"
 #include "content/public/browser/web_contents.h"
 #include "jni/RecentlyClosedBridge_jni.h"
@@ -126,6 +127,18 @@ jboolean RecentlyClosedTabsBridge::OpenRecentlyClosedTab(
   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;
+
+  tab_restore_service_->RestoreMostRecentEntry(nullptr);

[Theresa, 2016/07/07 19:00:13]

Please add a comment here explaining that we're passing null here because the
LiveTabContext will be determined later by a call to
AndroidLiveTabContext::FindLiveTabContextWithID

[xingliu, 2016/07/08 21:26:48]

Done.

+  return true;

[Theresa, 2016/07/07 19:00:13]

Should we check that TabRestoreService::RestoreMostRecentEntry returned a
LiveTab before returning true?

[xingliu, 2016/07/08 21:26:48]

Done.

+}
+
 void RecentlyClosedTabsBridge::ClearRecentlyClosedTabs(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj) {