Move iOS ImageFetcher to ios/web/public

ios/web/public/test/mock_image_data_fetcher.mm

Index: ios/web/public/test/mock_image_data_fetcher.mm
diff --git a/ios/web/public/test/mock_image_data_fetcher.mm b/ios/web/public/test/mock_image_data_fetcher.mm
new file mode 100644
index 0000000000000000000000000000000000000000..fbdfd57bbaf9c7822374c0c38f63b2c24b07a6a7
--- /dev/null
+++ b/ios/web/public/test/mock_image_data_fetcher.mm
@@ -0,0 +1,15 @@
+// Copyright 2015 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/test/mock_image_data_fetcher.h"
+
+namespace web {
+
+MockImageDataFetcher::MockImageDataFetcher(
+    const scoped_refptr<base::TaskRunner>& task_runner)
+    : ImageDataFetcher(task_runner) {}
+
+MockImageDataFetcher::~MockImageDataFetcher() {}
+
+}  // namespace web