[ios] Added WebState::GetLoadingProgress web// API.

ios/web/public/test/test_web_state.mm

 // Copyright 2014 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.
 
 #include "ios/web/public/test/test_web_state.h"
 
 #include <stdint.h>
 
 #include "base/callback.h"
 
@@ skipping 85 matching lines @@
 }
 
 const base::string16& TestWebState::GetTitle() const {
   return title_;
 }
 
 bool TestWebState::IsLoading() const {
   return false;
 }
 
+double TestWebState::GetLoadingProgress() const {
+  return 0.0;
+}
+
 bool TestWebState::IsBeingDestroyed() const {
   return false;
 }
 
 void TestWebState::SetCurrentURL(const GURL& url) {
   url_ = url;
 }
 
 void TestWebState::SetTrustLevel(URLVerificationTrustLevel trust_level) {
   trust_level_ = trust_level;
@@ skipping 10 matching lines @@
                                 const ImageDownloadCallback& callback) {
   return 0;
 }
 
 base::WeakPtr<WebState> TestWebState::AsWeakPtr() {
   NOTREACHED();
   return base::WeakPtr<WebState>();
 }
 
 }  // namespace web