Add RecentTabsPageTest

chrome/browser/android/recently_closed_tabs_bridge.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_RECENTLY_CLOSED_TABS_BRIDGE_H_
 #define CHROME_BROWSER_ANDROID_RECENTLY_CLOSED_TABS_BRIDGE_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "components/sessions/core/tab_restore_service_observer.h"
 
 class Profile;
 
 // Provides the list of recently closed tabs to Java.
 class RecentlyClosedTabsBridge : public sessions::TabRestoreServiceObserver {
  public:
-  explicit RecentlyClosedTabsBridge(Profile* profile);
+  RecentlyClosedTabsBridge(const base::android::JavaParamRef<jobject>& bridge,
+                           Profile* profile);
 
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
-  void SetRecentlyClosedCallback(
-      JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& obj,
-      const base::android::JavaParamRef<jobject>& jcallback);
   jboolean GetRecentlyClosedTabs(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jobject>& jtabs,
       jint max_tab_count);
   jboolean OpenRecentlyClosedTab(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jobject>& jtab,
       jint tab_id,
       jint j_disposition);
   jboolean OpenMostRecentlyClosedTab(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj);
   void ClearRecentlyClosedTabs(JNIEnv* env,
                                const base::android::JavaParamRef<jobject>& obj);
 
-  // Observer callback for TabRestoreServiceObserver. Notifies the registered
-  // callback that the recently closed tabs list has changed.
+  // Observer callback for TabRestoreServiceObserver. Notifies the Java bridge
+  // that the recently closed tabs list has changed.
   void TabRestoreServiceChanged(sessions::TabRestoreService* service) override;
 
   // Observer callback when our associated TabRestoreService is destroyed.
   void TabRestoreServiceDestroyed(
       sessions::TabRestoreService* service) override;
 
   // Registers JNI methods.
   static bool Register(JNIEnv* env);
 
  private:
   ~RecentlyClosedTabsBridge() override;
 
   // Construct and initialize tab_restore_service_ if it's NULL.
   // tab_restore_service_ may still be NULL, however, in incognito mode.
   void EnsureTabRestoreService();
 
-  // The callback to be notified when the list of recently closed tabs changes.
-  base::android::ScopedJavaGlobalRef<jobject> callback_;
+  // The Java RecentlyClosedBridge.
+  base::android::ScopedJavaGlobalRef<jobject> bridge_;
 
   // The profile whose recently closed tabs are being monitored.
   Profile* profile_;
 
   // TabRestoreService that we are observing.
   sessions::TabRestoreService* tab_restore_service_;
 
   DISALLOW_COPY_AND_ASSIGN(RecentlyClosedTabsBridge);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_RECENTLY_CLOSED_TABS_BRIDGE_H_