[Offline Pages] Add basic evaluation tests and related changes.

chrome/browser/android/offline_pages/evaluation/offline_page_evaluation_bridge.h

 // Copyright 2016 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_OFFLINE_PAGES_EVALUATION_OFFLINE_PAGE_EVALUATION_BRIDGE_H_
 #define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_EVALUATION_OFFLINE_PAGE_EVALUATION_BRIDGE_H_
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/android/scoped_java_ref.h"
@@ skipping 37 matching lines @@
   void OnAdded(const SavePageRequest& request) override;
   void OnCompleted(const SavePageRequest& request,
                    RequestNotifier::BackgroundSavePageResult status) override;
   void OnChanged(const SavePageRequest& request) override;
 
   void GetAllPages(JNIEnv* env,
                    const base::android::JavaParamRef<jobject>& obj,
                    const base::android::JavaParamRef<jobject>& j_result_obj,
                    const base::android::JavaParamRef<jobject>& j_callback_obj);
 
-  void PushRequestProcessing(
+  // Return true if processing starts and callback is expected to be called.
+  // False otherwise.
+  bool PushRequestProcessing(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jobject>& j_callback_obj);
 
   void SavePageLater(JNIEnv* env,
                      const base::android::JavaParamRef<jobject>& obj,
                      const base::android::JavaParamRef<jstring>& url,
                      const base::android::JavaParamRef<jstring>& j_namespace,
                      const base::android::JavaParamRef<jstring>& j_client_id,
                      jboolean user_requested);
@@ skipping 15 matching lines @@
   // Not owned.
   RequestCoordinator* request_coordinator_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflinePageEvaluationBridge);
 };
 
 }  // namespace android
 }  // namespace offline_pages
 
 #endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_EVALUATION_OFFLINE_PAGE_EVALUATION_BRIDGE_H_