Refactoring ImageBuffer to decouple it from Canvas2DLayerBridge

Source/core/rendering/shapes/Shape.cpp

Index: Source/core/rendering/shapes/Shape.cpp
diff --git a/Source/core/rendering/shapes/Shape.cpp b/Source/core/rendering/shapes/Shape.cpp
index 12d43da8e6a13dd210a6d5e008c7f6690a22643d..d293ccdf7121dfcd52425fcdfb9d2e8c23798002 100644
--- a/Source/core/rendering/shapes/Shape.cpp
+++ b/Source/core/rendering/shapes/Shape.cpp
@@ -210,10 +210,8 @@ PassOwnPtr<Shape> Shape::createShape(const StyleImage* styleImage, float thresho
 
     Image* image = styleImage->cachedImage()->image();
     const IntSize& imageSize = image->size();
-    OwnPtr<ImageBuffer> imageBuffer = ImageBuffer::create(imageSize);
-
     OwnPtr<RasterShapeIntervals> intervals = adoptPtr(new RasterShapeIntervals(imageSize.height()));
-
+    OwnPtr<ImageBuffer> imageBuffer = ImageBuffer::create(imageSize);
     if (imageBuffer) {
         GraphicsContext* graphicsContext = imageBuffer->context();
         graphicsContext->drawImage(image, IntPoint());