[S.P.] Don't draw frames of animated images that are offscreen.

Source/core/paint/ImagePainter.cpp

Index: Source/core/paint/ImagePainter.cpp
diff --git a/Source/core/paint/ImagePainter.cpp b/Source/core/paint/ImagePainter.cpp
index 62f4066a5ed5827fca2bae0a94a7dc5498ad039b..6a3ebabd42eb1114b77a96bb8797c22366d37f06 100644
--- a/Source/core/paint/ImagePainter.cpp
+++ b/Source/core/paint/ImagePainter.cpp
@@ -127,7 +127,7 @@ void ImagePainter::paintIntoRect(GraphicsContext* context, const LayoutRect& rec
     RefPtr<Image> image = m_layoutImage.imageResource()->image(alignedRect.width(), alignedRect.height());
     if (!image || image->isNull())
         return;
-
+    fprintf(stderr, "painting image\n");

[Xianzhu, 2015/03/19 22:14:22]

Remove.

[chrishtr, 2015/03/19 22:15:16]

Good catch. Fixed.

     // FIXME: why is interpolation quality selection not included in the Instrumentation reported cost of drawing an image?
     InterpolationQuality interpolationQuality = BoxPainter::chooseInterpolationQuality(m_layoutImage, context, image.get(), image.get(), LayoutSize(alignedRect.size()));