Cleanup two trivial PaintOffset bugs in prep for caching paint offset

This is a trivial patch, split off from https://codereview.chromium.org/1315993004.
This patch removes an incorrect "paintOffset" name and fixes the recorder
type in BlockFlowPainter.

Review URL: https://codereview.chromium.org/1316883003

git-svn-id: svn://svn.chromium.org/blink/trunk@201284 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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

@@ -65,7 +65,7 @@ void BlockFlowPainter::paintSelection(const PaintInfo& paintInfo, const LayoutPo
     // Only create a DrawingRecorder and ClipScope if skipRecording is false. This logic is needed
     // because selectionGaps(...) needs to be called even when we do not record.
     bool skipRecording = LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_layoutBlockFlow, DisplayItem::SelectionGap);
-    Optional<DrawingRecorder> drawingRecorder;
+    Optional<LayoutObjectDrawingRecorder> drawingRecorder;
     Optional<ClipScope> clipScope;
     if (!skipRecording) {
         drawingRecorder.emplace(*paintInfo.context, m_layoutBlockFlow, DisplayItem::SelectionGap, FloatRect(bounds));

third_party/WebKit/Source/core/paint/ImagePainter.h

@@ -19,7 +19,7 @@ public:
 
     void paint(const PaintInfo&, const LayoutPoint& paintOffset);
     void paintReplaced(const PaintInfo&, const LayoutPoint& paintOffset);
-    void paintIntoRect(GraphicsContext*, const LayoutRect& paintOffset);
+    void paintIntoRect(GraphicsContext*, const LayoutRect&);
 
 private:
     void paintAreaElementFocusRing(const PaintInfo&);