Revert of Remove PaintInfo's paintingRoot

third_party/WebKit/Source/core/paint/FramePainter.cpp

Index: third_party/WebKit/Source/core/paint/FramePainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/FramePainter.cpp b/third_party/WebKit/Source/core/paint/FramePainter.cpp
index 51f46d85e91cc9db3c4874725acc4c50f6541815..850393738b36dd5943d4be2aa3664223130e089b 100644
--- a/third_party/WebKit/Source/core/paint/FramePainter.cpp
+++ b/third_party/WebKit/Source/core/paint/FramePainter.cpp
@@ -74,6 +74,8 @@
         fillWithRed = false; // Transparent, don't fill with red.
     else if (globalPaintFlags & GlobalPaintSelectionOnly)
         fillWithRed = false; // Selections are transparent, don't fill with red.
+    else if (frameView().nodeToDraw())
+        fillWithRed = false; // Element images are transparent, don't fill with red.
     else
         fillWithRed = true;
 
@@ -108,6 +110,8 @@
     ASSERT(!frameView().isPainting());
     frameView().setIsPainting(true);
 
+    // frameView().nodeToDraw() is used to draw only one element (and its descendants)
+    LayoutObject* layoutObject = frameView().nodeToDraw() ? frameView().nodeToDraw()->layoutObject() : 0;
     PaintLayer* rootLayer = layoutView->layer();
 
 #if ENABLE(ASSERT)
@@ -120,10 +124,10 @@
     float deviceScaleFactor = blink::deviceScaleFactor(rootLayer->layoutObject()->frame());
     context.setDeviceScaleFactor(deviceScaleFactor);
 
-    layerPainter.paint(context, LayoutRect(rect), localPaintFlags);
+    layerPainter.paint(context, LayoutRect(rect), localPaintFlags, layoutObject);
 
     if (rootLayer->containsDirtyOverlayScrollbars())
-        layerPainter.paintOverlayScrollbars(context, LayoutRect(rect), localPaintFlags);
+        layerPainter.paintOverlayScrollbars(context, LayoutRect(rect), localPaintFlags, layoutObject);
 
     frameView().setIsPainting(false);