Android: support http referrers for context menu navigations.

chrome/browser/ui/android/context_menu_helper.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_UI_ANDROID_CONTEXT_MENU_HELPER_H_
 #define CHROME_BROWSER_UI_ANDROID_CONTEXT_MENU_HELPER_H_
 
 #include "base/android/jni_android.h"
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 23 matching lines @@
   void OnCustomItemSelected(JNIEnv* env, jobject obj, jint action);
   void OnStartDownload(JNIEnv* env, jobject obj, jboolean jis_link);
 
  private:
   explicit ContextMenuHelper(content::WebContents* web_contents);
   friend class content::WebContentsUserData<ContextMenuHelper>;
 
   static base::android::ScopedJavaLocalRef<jobject> CreateJavaContextMenuParams(
       const content::ContextMenuParams& params);
 
+  // Strips the referring url of the username, password and ref fields.
+  static GURL SanitizeReferrer(const GURL& referrer);
+
   base::android::ScopedJavaGlobalRef<jobject> java_obj_;
   content::WebContents* web_contents_;
 
   base::Callback<void(int)> context_menu_callback_;
   content::ContextMenuParams context_menu_params_;
 
   DISALLOW_COPY_AND_ASSIGN(ContextMenuHelper);
 };
 
 bool RegisterContextMenuHelper(JNIEnv* env);
 
 #endif  // CHROME_BROWSER_UI_ANDROID_CONTEXT_MENU_HELPER_H_