Removing the dependency on GraphicsContext for drawing images in 2D canvas

Source/platform/graphics/Image.cpp

Index: Source/platform/graphics/Image.cpp
diff --git a/Source/platform/graphics/Image.cpp b/Source/platform/graphics/Image.cpp
index 960d338fd2521df74be573fbb4ebe0499f5d3da8..a61f77f59d8d58d0244fd232bb19a898e791cd61 100644
--- a/Source/platform/graphics/Image.cpp
+++ b/Source/platform/graphics/Image.cpp
@@ -153,7 +153,7 @@ void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& destRect, const Fl
         visibleSrcRect.setY((destRect.y() - oneTileRect.y()) / scale.height());
         visibleSrcRect.setWidth(destRect.width() / scale.width());
         visibleSrcRect.setHeight(destRect.height() / scale.height());
-        draw(ctxt, destRect, visibleSrcRect, op, DoNotRespectImageOrientation);
+        ctxt->drawImage(this, destRect, visibleSrcRect, op, DoNotRespectImageOrientation);
         return;
     }
 
@@ -279,20 +279,20 @@ void Image::drawPattern(GraphicsContext* context, const FloatRect& floatSrcRect,
     SkBitmap bitmapToPaint;
     bitmap.extractSubset(&bitmapToPaint, enclosingIntRect(normSrcRect));
 
-    bool isLazyDecoded = DeferredImageDecoder::isLazyDecoded(bitmap);
     {
-        SkPaint paint;
-        int initialSaveCount = context->preparePaintForDrawRectToRect(&paint, floatSrcRect,
-            destRect, compositeOp, !bitmap.isOpaque(), isLazyDecoded, bitmap.isImmutable());
+        SkPaint paint = context->fillPaint();
+        paint.setColor(SK_ColorBLACK);
+        paint.setXfermodeMode(compositeOp);
+        GraphicsContextImageFilterQualityHelper filterHelper(context);
+        paint.setFilterQuality(filterHelper.computeFilterQuality(this, destRect, normSrcRect));
+        paint.setAntiAlias(filterHelper.shouldDrawAntiAliased(destRect));
         RefPtr<SkShader> shader = createPatternShader(bitmapToPaint, localMatrix, paint,
             FloatSize(repeatSpacing.width() / scale.width(), repeatSpacing.height() / scale.height()));
-
         paint.setShader(shader.get());
         context->drawRect(destRect, paint);
-        context->canvas()->restoreToCount(initialSaveCount);
     }
 
-    if (isLazyDecoded)
+    if (DeferredImageDecoder::isLazyDecoded(bitmap))
         PlatformInstrumentation::didDrawLazyPixelRef(bitmap.getGenerationID());
 }