[Offline pages] Expose offline pages URL related methods in java code.

chrome/browser/android/offline_pages/offline_page_bridge.h

Index: chrome/browser/android/offline_pages/offline_page_bridge.h
diff --git a/chrome/browser/android/offline_pages/offline_page_bridge.h b/chrome/browser/android/offline_pages/offline_page_bridge.h
index 11c67f5a3c23b86d810d66815a07c8010cb0a649..0bfe92be4d5a8060365e9064f2b225e424c1a105 100644
--- a/chrome/browser/android/offline_pages/offline_page_bridge.h
+++ b/chrome/browser/android/offline_pages/offline_page_bridge.h
@@ -78,6 +78,16 @@ class OfflinePageBridge : public OfflinePageModel::Observer {
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj);
 
+  base::android::ScopedJavaLocalRef<jstring> GetOfflineUrlForOnlineUrl(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      const base::android::JavaParamRef<jstring>& j_online_url);
+
+  jboolean IsOfflinePageUrl(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      const base::android::JavaParamRef<jstring>& j_offline_url);
+
  private:
   void NotifyIfDoneLoading() const;
 
@@ -87,6 +97,8 @@ class OfflinePageBridge : public OfflinePageModel::Observer {
 
   JavaObjectWeakGlobalRef weak_java_ref_;
   // Not owned.
+  content::BrowserContext* browser_context_;
+  // Not owned.
   OfflinePageModel* offline_page_model_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflinePageBridge);