[blimp] Change to use SHA-256 instead of SHA-1 for unique ids

blimp/engine/renderer/engine_image_serialization_processor.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/engine/renderer/engine_image_serialization_processor.h"
 
 #include <stddef.h>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
-#include "base/sha1.h"
 #include "base/strings/string_number_conversions.h"
-#include "base/strings/string_util.h"
 #include "base/trace_event/trace_event.h"
 #include "blimp/common/blob_cache/id_util.h"
 #include "blimp/common/compositor/webp_decoder.h"
 #include "blimp/common/proto/blob_cache.pb.h"
 #include "content/public/renderer/render_frame.h"
 #include "third_party/libwebp/webp/encode.h"
 #include "third_party/skia/include/core/SkData.h"
 #include "third_party/skia/include/core/SkPicture.h"
 #include "third_party/skia/include/core/SkPixelSerializer.h"
 #include "third_party/skia/include/core/SkUnPreMultiply.h"
@@ skipping 42 matching lines @@
 
     // Ensure width and height are valid dimensions.
     if (!pixmap.width() || pixmap.width() > WEBP_MAX_DIMENSION)
       return nullptr;
     picture.width = pixmap.width();
     if (!pixmap.height() || pixmap.height() > WEBP_MAX_DIMENSION)
       return nullptr;
     picture.height = pixmap.height();
 
     const BlobId blob_id = CalculateBlobId(pixmap.addr(), pixmap.getSafeSize());
-    std::string blob_id_hex = FormatBlobId(blob_id);
+    std::string blob_id_hex = BlobIdToString(blob_id);
 
     // Create proto with all requires information.
     BlobCacheImageMetadata proto;
     proto.set_id(blob_id);
     proto.set_width(pixmap.width());
     proto.set_height(pixmap.height());
 
     if (g_client_cache_contents.Get().find(blob_id) !=
         g_client_cache_contents.Get().end()) {
       // Found image in client cache, so skip sending decoded payload.
@@ skipping 139 matching lines @@
   return pixel_serializer_.get();
 }
 
 SkPicture::InstallPixelRefProc
 EngineImageSerializationProcessor::GetPixelDeserializer() {
   return nullptr;
 }
 
 }  // namespace engine
 }  // namespace blimp