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

chrome/browser/android/offline_pages/offline_page_bridge.cc

Index: chrome/browser/android/offline_pages/offline_page_bridge.cc
diff --git a/chrome/browser/android/offline_pages/offline_page_bridge.cc b/chrome/browser/android/offline_pages/offline_page_bridge.cc
index 54f42a4e2d9cfa712348c9aa457289a4f9b0b07b..e377fb72d9c3bbd8c07609cc23f7a2ed7dc654bc 100644
--- a/chrome/browser/android/offline_pages/offline_page_bridge.cc
+++ b/chrome/browser/android/offline_pages/offline_page_bridge.cc
@@ -9,6 +9,7 @@
 #include "base/basictypes.h"
 #include "chrome/browser/android/offline_pages/offline_page_mhtml_archiver.h"
 #include "chrome/browser/android/offline_pages/offline_page_model_factory.h"
+#include "chrome/browser/android/offline_pages/offline_page_utils.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_android.h"
 #include "components/offline_pages/offline_page_feature.h"
@@ -81,6 +82,7 @@ OfflinePageBridge::OfflinePageBridge(JNIEnv* env,
                                      jobject obj,
                                      content::BrowserContext* browser_context)
     : weak_java_ref_(env, obj),
+      browser_context_(browser_context),
       offline_page_model_(
           OfflinePageModelFactory::GetForBrowserContext(browser_context)) {
   NotifyIfDoneLoading();
@@ -224,6 +226,23 @@ void OfflinePageBridge::CheckMetadataConsistency(
   offline_page_model_->CheckForExternalFileDeletion();
 }
 
+ScopedJavaLocalRef<jstring> OfflinePageBridge::GetOfflineUrlByOnlineUrl(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    const JavaParamRef<jstring>& j_online_url) {
+  GURL online_url(ConvertJavaStringToUTF8(env, j_online_url));
+  GURL offline_url = GetOfflineURLByOnlineURL(browser_context_, online_url);
+  return ConvertUTF8ToJavaString(env, offline_url.spec());
+}
+
+jboolean OfflinePageBridge::IsOfflinePageUrl(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    const JavaParamRef<jstring>& j_offline_url) {
+  GURL offline_url(ConvertJavaStringToUTF8(env, j_offline_url));
+  return IsOfflinePage(browser_context_, offline_url);
+}
+
 void OfflinePageBridge::NotifyIfDoneLoading() const {
   if (!offline_page_model_->is_loaded())
     return;