Move offline related functions from Tab to OfflinePageUtils

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 c6a8b622c6ffd9064de400de6637fa46d9b0c24b..db898dfb8c4a24ec46769c1b18a637209de5af7c 100644
--- a/chrome/browser/android/offline_pages/offline_page_bridge.h
+++ b/chrome/browser/android/offline_pages/offline_page_bridge.h
@@ -144,6 +144,16 @@ class OfflinePageBridge : public OfflinePageModel::Observer,
 
   base::android::ScopedJavaGlobalRef<jobject> java_ref() { return java_ref_; }
 
+  jboolean IsOfflinePage(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      const base::android::JavaParamRef<jobject>& j_web_contents);
+
+  base::android::ScopedJavaLocalRef<jobject> GetOfflinePage(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      const base::android::JavaParamRef<jobject>& j_web_contents);
+
  private:
   void NotifyIfDoneLoading() const;