Use RefPtr for SkBitmap::Allocator in ImageDecoder

third_party/WebKit/Source/platform/image-decoders/ImageFrame.cpp

Index: third_party/WebKit/Source/platform/image-decoders/ImageFrame.cpp
diff --git a/third_party/WebKit/Source/platform/image-decoders/ImageFrame.cpp b/third_party/WebKit/Source/platform/image-decoders/ImageFrame.cpp
index 1390439648a4bbd767300fe45c3ee736ab1ead0f..47f41060695d502f5f779f74a54c300870bfdee1 100644
--- a/third_party/WebKit/Source/platform/image-decoders/ImageFrame.cpp
+++ b/third_party/WebKit/Source/platform/image-decoders/ImageFrame.cpp
@@ -29,8 +29,7 @@
 namespace blink {
 
 ImageFrame::ImageFrame()
-    : m_allocator(0)
-    , m_hasAlpha(true)
+    : m_hasAlpha(true)
     , m_status(FrameEmpty)
     , m_duration(0)
     , m_disposalMethod(DisposeNotSpecified)
@@ -53,7 +52,7 @@ ImageFrame& ImageFrame::operator=(const ImageFrame& other)
     // Be sure to assign this before calling setStatus(), since setStatus() may
     // call notifyBitmapIfPixelsChanged().
     m_pixelsChanged = other.m_pixelsChanged;
-    setMemoryAllocator(other.allocator());
+    m_allocator = other.m_allocator;
     setOriginalFrameRect(other.originalFrameRect());
     setStatus(other.getStatus());
     setDuration(other.duration());
@@ -100,7 +99,7 @@ bool ImageFrame::setSize(int newWidth, int newHeight)
 
     m_bitmap.setInfo(SkImageInfo::MakeN32(newWidth, newHeight,
         m_premultiplyAlpha ? kPremul_SkAlphaType : kUnpremul_SkAlphaType));
-    if (!m_bitmap.tryAllocPixels(m_allocator, 0))
+    if (!m_bitmap.tryAllocPixels(m_allocator.get(), 0))
         return false;
 
     zeroFillPixelData();