[Webkit-unassigned] [Bug 69101] New: [chromium] Memory leak when updating GPU layers

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=69101

           Summary: [chromium] Memory leak when updating GPU layers
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Platform
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: achicu at adobe.com


Every time a GPU layer is updated the CG graphics context is leaked:

In http://svn.webkit.org/repository/webkit/trunk/Source/WebCore/platform/graphics/chromium/PlatformCanvas.h the m_contextCG  and m_colorSpace members are RetainPtr, but the initial reference is never released. RetainPtr needs adoptCF in order to adopt the reference of the objects that were just created.

        RetainPtr<CGColorSpaceRef> m_colorSpace;
        RetainPtr<CGContextRef> m_contextCG;

http://svn.webkit.org/repository/webkit/trunk/Source/WebCore/platform/graphics/chromium/PlatformCanvas.cpp

    m_colorSpace = CGColorSpaceCreateDeviceRGB();
    size_t rowBytes = canvas->size().width() * 4;
    m_contextCG = CGBitmapContextCreate(canvas->m_pixelData.get(),
                                        canvas->size().width(), canvas->size().height(), 8, rowBytes,
                                        m_colorSpace.get(),
                                        kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host);

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