Remove RenderLayerFilterInfo::m_dirtySourceRect

Source/core/rendering/RenderLayer.cpp

Index: Source/core/rendering/RenderLayer.cpp
diff --git a/Source/core/rendering/RenderLayer.cpp b/Source/core/rendering/RenderLayer.cpp
index 933e0ea3c32a8229422ed41898fac51bbcb7278e..7b4de596ab34e8f6b7efb7a2c72440c6fb319607 100644
--- a/Source/core/rendering/RenderLayer.cpp
+++ b/Source/core/rendering/RenderLayer.cpp
@@ -1830,18 +1830,12 @@ void RenderLayer::paintLayerContents(GraphicsContext* context, const LayerPainti
     LayerPaintingInfo localPaintingInfo(paintingInfo);
     FilterEffectRendererHelper filterPainter(filterRenderer() && paintsWithFilters());
     if (filterPainter.haveFilterEffect()) {
-        RenderLayerFilterInfo* filterInfo = this->filterInfo();
-        ASSERT(filterInfo);
-        LayoutRect filterRepaintRect = filterInfo->dirtySourceRect();
-        filterRepaintRect.move(offsetFromRoot.x(), offsetFromRoot.y());
+        ASSERT(this->filterInfo());
 
         if (!rootRelativeBoundsComputed)
             rootRelativeBounds = physicalBoundingBoxIncludingReflectionAndStackingChildren(paintingInfo.rootLayer, offsetFromRoot);
 
-        if (filterPainter.prepareFilterEffect(this, rootRelativeBounds, paintingInfo.paintDirtyRect, filterRepaintRect)) {
-            // Now we know for sure, that the source image will be updated, so we can revert our tracking repaint rect back to zero.
-            filterInfo->resetDirtySourceRect();
-
+        if (filterPainter.prepareFilterEffect(this, rootRelativeBounds, paintingInfo.paintDirtyRect)) {
             // Rewire the old context to a memory buffer, so that we can capture the contents of the layer.
             // NOTE: We saved the old context in the "transparencyLayerContext" local variable, to be able to start a transparency layer
             // on the original context and avoid duplicating "beginFilterEffect" after each transparency layer call. Also, note that