blimp: Cleanup class/struct forward declarations

blimp/engine/mojo/font_fetcher_mojo_impl.h

 // Copyright 2016 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.
 
 #ifndef BLIMP_ENGINE_MOJO_FONT_FETCHER_MOJO_IMPL_H_
 #define BLIMP_ENGINE_MOJO_FONT_FETCHER_MOJO_IMPL_H_
 
 #include <string>
 
 #include "blimp/engine/mojo/font_fetcher.mojom.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 
-class SkStream;
-
 namespace blimp {
 namespace engine {
 
 class FontDataFetcher;
 
 // Service for processing FontFetcher requests from the renderer.
 // Caller is responsible for executing all methods on the IO thread.
 class FontFetcherMojoImpl : public mojom::FontFetcher {
  public:
   // |font_data_fetcher|: The FontDataFetcher object which will get the font
@@ skipping 16 matching lines @@
   // service.
   FontDataFetcher* font_data_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(FontFetcherMojoImpl);
 };
 
 }  // namespace engine
 }  // namespace blimp
 
 #endif  // BLIMP_ENGINE_MOJO_FONT_FETCHER_MOJO_IMPL_H_