Remove redundant DecodingImageGenerator::m_generationId

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

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 20 matching lines @@
 #include "platform/graphics/ImageFrameGenerator.h"
 #include "platform/image-decoders/ImageDecoder.h"
 #include "third_party/skia/include/core/SkData.h"
 
 namespace blink {
 
 DecodingImageGenerator::DecodingImageGenerator(PassRefPtr<ImageFrameGenerator> frameGenerator, const SkImageInfo& info, size_t index)
     : SkImageGenerator(info)
     , m_frameGenerator(frameGenerator)
     , m_frameIndex(index)
-    , m_generationId(0)
     , m_canYUVDecode(false)
 {
 }
 
 DecodingImageGenerator::~DecodingImageGenerator()
 {
 }
 
 SkData* DecodingImageGenerator::onRefEncodedData()
 {
     TRACE_EVENT0("blink", "DecodingImageGenerator::refEncodedData");
 
     return m_frameGenerator->refEncodedData();
 }
 
 bool DecodingImageGenerator::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, SkPMColor table[], int* tableCount)
 {
     TRACE_EVENT1("blink", "DecodingImageGenerator::getPixels", "frame index", static_cast<int>(m_frameIndex));
 
     // Implementation doesn't support scaling yet so make sure we're not given a different size.
     if (info.width() != getInfo().width() || info.height() != getInfo().height())
         return false;
 
     if (info.colorType() != getInfo().colorType()) {
         // blink::ImageFrame may have changed the owning SkBitmap to kOpaque_SkAlphaType after fully decoding the image frame,
         // so if we see a request for opaque, that is ok even if our initial alpha type was not opaque.
         return false;
     }
 
-    PlatformInstrumentation::willDecodeLazyPixelRef(m_generationId);
+    PlatformInstrumentation::willDecodeLazyPixelRef(uniqueID());
     bool decoded = m_frameGenerator->decodeAndScale(m_frameIndex, getInfo(), pixels, rowBytes);
     PlatformInstrumentation::didDecodeLazyPixelRef();
 
     return decoded;
 }
 
 bool DecodingImageGenerator::onQueryYUV8(SkYUVSizeInfo* sizeInfo, SkYUVColorSpace* colorSpace) const
 {
     if (!m_canYUVDecode)
         return false;
 
     TRACE_EVENT1("blink", "DecodingImageGenerator::queryYUV8", "sizes", static_cast<int>(m_frameIndex));
 
     if (colorSpace)
         *colorSpace = kJPEG_SkYUVColorSpace;
 
     return m_frameGenerator->getYUVComponentSizes(sizeInfo);
 }
 
 bool DecodingImageGenerator::onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3])
 {
     ASSERT(m_canYUVDecode);
 
     TRACE_EVENT1("blink", "DecodingImageGenerator::getYUV8Planes", "frame index", static_cast<int>(m_frameIndex));
 
-    PlatformInstrumentation::willDecodeLazyPixelRef(m_generationId);
+    PlatformInstrumentation::willDecodeLazyPixelRef(uniqueID());
     bool decoded = m_frameGenerator->decodeToYUV(m_frameIndex, sizeInfo.fSizes, planes, sizeInfo.fWidthBytes);
     PlatformInstrumentation::didDecodeLazyPixelRef();
 
     return decoded;
 }
 
 SkImageGenerator* DecodingImageGenerator::create(SkData* data)
 {
     RefPtr<SharedBuffer> buffer = SharedBuffer::create(data->bytes(), data->size());
 
@@ skipping 11 matching lines @@
     const SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
 
     RefPtr<ImageFrameGenerator> frame = ImageFrameGenerator::create(SkISize::Make(size.width(), size.height()), buffer, true, false);
     if (!frame)
         return 0;
 
     return new DecodingImageGenerator(frame, info, 0);
 }
 
 } // namespace blink