Revert of Replaced cc::SurfaceId::nonce_ with base::UnguessableToken

third_party/WebKit/Source/platform/graphics/OffscreenCanvasFrameDispatcherImpl.cpp

 // 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 "platform/graphics/OffscreenCanvasFrameDispatcherImpl.h"
 
 #include "cc/output/compositor_frame.h"
 #include "cc/quads/texture_draw_quad.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "platform/Histogram.h"
@@ skipping 10 matching lines @@
 #include "ui/gfx/transform.h"
 #include "wtf/typed_arrays/ArrayBuffer.h"
 #include "wtf/typed_arrays/Uint8Array.h"
 
 namespace blink {
 
 OffscreenCanvasFrameDispatcherImpl::OffscreenCanvasFrameDispatcherImpl(
     uint32_t clientId,
     uint32_t sinkId,
     uint32_t localId,
-    uint64_t nonceHigh,
-    uint64_t nonceLow,
+    uint64_t nonce,
     int width,
     int height)
-    : m_surfaceId(
-          cc::FrameSinkId(clientId, sinkId),
-          cc::LocalFrameId(
-              localId,
-              base::UnguessableToken::Deserialize(nonceHigh, nonceLow))),
+    : m_surfaceId(cc::FrameSinkId(clientId, sinkId),
+                  cc::LocalFrameId(localId, nonce)),
       m_width(width),
       m_height(height),
       m_nextResourceId(1u),
       m_binding(this) {
   DCHECK(!m_sink.is_bound());
   mojom::blink::OffscreenCanvasCompositorFrameSinkProviderPtr provider;
   Platform::current()->interfaceProvider()->getInterface(
       mojo::GetProxy(&provider));
   provider->CreateCompositorFrameSink(m_surfaceId,
                                       m_binding.CreateInterfacePtrAndBind(),
@@ skipping 288 matching lines @@
 }
 
 bool OffscreenCanvasFrameDispatcherImpl::verifyImageSize(
     const IntSize imageSize) {
   if (imageSize.width() == m_width && imageSize.height() == m_height)
     return true;
   return false;
 }
 
 }  // namespace blink