Move ImageFetcher to its own target.

components/image_fetcher/ios/mock_raw_image_fetcher.mm

Index: components/image_fetcher/ios/mock_raw_image_fetcher.mm
diff --git a/components/image_fetcher/ios/mock_raw_image_fetcher.mm b/components/image_fetcher/ios/mock_raw_image_fetcher.mm
new file mode 100644
index 0000000000000000000000000000000000000000..7200b26685dc9bad2edecf2b7fff2afb267a2256
--- /dev/null
+++ b/components/image_fetcher/ios/mock_raw_image_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 "components/image_fetcher/ios/mock_raw_image_fetcher.h"
+
+namespace image_fetcher {
+
+MockRawImageFetcher::MockRawImageFetcher(
+    const scoped_refptr<base::TaskRunner>& task_runner)
+    : RawImageFetcher(task_runner) {}
+
+MockRawImageFetcher::~MockRawImageFetcher() {}
+
+}  // namespace image_fetcher