Add support for encoding/decoding WebP images.

blimp/common/compositor/blimp_remote_image_deserializer.cc

 // 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.
 
 #include "blimp/common/compositor/blimp_remote_image_deserializer.h"
 
+#include "blimp/common/compositor/webp_decoder.h"
 #include "third_party/skia/include/core/SkPicture.h"
 
-namespace {
-bool NoopDecoder(const void* input, size_t input_size, SkBitmap* bitmap) {
-  // TODO(nyquist): Add an image decoder.
-  return false;
-}
-}
-
 namespace blimp {
 
 BlimpRemoteImageDeserializer::BlimpRemoteImageDeserializer() {}
 
 BlimpRemoteImageDeserializer::~BlimpRemoteImageDeserializer() {}
 
 SkPicture::InstallPixelRefProc
 BlimpRemoteImageDeserializer::GetPixelDeserializer() {
-  return &NoopDecoder;
+  return &WebPDecoder;
 }
 
 }  // namespace blimp