Fix include path for moved thread_task_runner_handle.h header in ios/

ios/chrome/browser/net/image_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/chrome/browser/net/image_fetcher.h"
 
 #import <UIKit/UIKit.h>
 
 #include "base/ios/ios_util.h"
 #include "base/mac/scoped_block.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
-#include "base/thread_task_runner_handle.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/test_url_fetcher_factory.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 namespace {
 
 static unsigned char kJPGImage[] = {
@@ skipping 159 matching lines @@
   EXPECT_EQ(static_cast<UIImage*>(nil), result_);
   EXPECT_FALSE(called_);
 }
 
 TEST_F(ImageFetcherTest, TestCallbacksNotCalledDuringDeletion) {
   image_fetcher_->StartDownload(GURL(kTestUrl), callback_);
   image_fetcher_.reset();
   EXPECT_FALSE(called_);
 }