Re-enable WebP tests

ios/web/public/image_fetcher/image_data_fetcher_unittest.mm

 // Copyright 2011 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.
 
 #import "ios/web/public/image_fetcher/image_data_fetcher.h"
 
 #import <UIKit/UIKit.h>
 
 #include "base/ios/ios_util.h"
 #include "base/mac/scoped_block.h"
@@ skipping 140 matching lines @@
 TEST_F(ImageDataFetcherTest, TestPng) {
   net::TestURLFetcher* fetcher = SetupFetcher();
   fetcher->set_response_code(200);
   fetcher->SetResponseString(std::string((char*)kPNGImage, sizeof(kPNGImage)));
   fetcher->delegate()->OnURLFetchComplete(fetcher);
   EXPECT_NE(nil, result_);
   EXPECT_TRUE(called_);
 }
 
 TEST_F(ImageDataFetcherTest, TestGoodWebP) {
-// TODO(droger): This test fails on iOS 9 x64 devices. http://crbug.com/523235
-#if defined(OS_IOS) && defined(ARCH_CPU_ARM64) && !TARGET_IPHONE_SIMULATOR
-  if (base::ios::IsRunningOnIOS9OrLater())
-    return;
-#endif
   net::TestURLFetcher* fetcher = SetupFetcher();
   fetcher->set_response_code(200);
   fetcher->SetResponseString(
       std::string((char*)kWEBPImage, sizeof(kWEBPImage)));
   scoped_refptr<net::HttpResponseHeaders> headers(new net::HttpResponseHeaders(
       std::string(kWEBPHeaderResponse, arraysize(kWEBPHeaderResponse))));
   fetcher->set_response_headers(headers);
   fetcher->delegate()->OnURLFetchComplete(fetcher);
   worker_thread_.FlushForTesting();
   base::RunLoop().RunUntilIdle();
@@ skipping 32 matching lines @@
   EXPECT_FALSE(called_);
 }
 
 TEST_F(ImageDataFetcherTest, TestCallbacksNotCalledDuringDeletion) {
   image_fetcher_->StartDownload(GURL(kTestUrl), callback_);
   image_fetcher_.reset();
   EXPECT_FALSE(called_);
 }
 
 }  // namespace web