[blimp] Add SkPicture caching support.

blimp/client/feature/compositor/blimp_image_decoder.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/client/feature/compositor/blimp_image_decoder.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/strings/string_number_conversions.h"
 #include "blimp/common/blob_cache/blob_cache.h"
 #include "blimp/common/blob_cache/id_util.h"
 #include "blimp/common/blob_cache/in_memory_blob_cache.h"
 #include "blimp/common/proto/blob_cache.pb.h"
 #include "third_party/libwebp/webp/decode.h"
 #include "third_party/libwebp/webp/demux.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace blimp {
 namespace {
 
 // TODO(nyquist): Make this not be infinite size.
 static base::LazyInstance<InMemoryBlobCache> g_blob_cache =
     LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
 namespace client {
 
-bool BlimpImageDecoder(const void* input, size_t input_size, SkBitmap* bitmap) {
+bool DecodeBlimpImage(const void* input, size_t input_size, SkBitmap* bitmap) {
   DCHECK(bitmap);
 
   // Initialize an empty WebPDecoderConfig.
   WebPDecoderConfig config;
   if (!WebPInitDecoderConfig(&config)) {
     LOG(WARNING) << "Failed to initialize WebP config.";
     return false;
   }
 
   BlobCacheImageMetadata deserialized;
@@ skipping 91 matching lines @@
     BlobDataPtr to_cache(new BlobData(std::string(
         reinterpret_cast<const char*>(webp_data.bytes), webp_data.size)));
     g_blob_cache.Get().Put(deserialized.id(), std::move(to_cache));
   }
 
   return true;
 }
 
 }  // namespace client
 }  // namespace blimp