Implement interfaces in PaintInfo and make it a class.

Source/core/rendering/RenderThemeChromiumSkia.h

Index: Source/core/rendering/RenderThemeChromiumSkia.h
diff --git a/Source/core/rendering/RenderThemeChromiumSkia.h b/Source/core/rendering/RenderThemeChromiumSkia.h
index f3550c7aca021366f09adb08e300ecce74917888..4538ccf6058729b353b9981976f33e330a0a29a2 100644
--- a/Source/core/rendering/RenderThemeChromiumSkia.h
+++ b/Source/core/rendering/RenderThemeChromiumSkia.h
@@ -81,24 +81,24 @@ public:
     virtual bool paintSearchField(RenderObject*, const PaintInfo&, const IntRect&);
 
     virtual void adjustSearchFieldCancelButtonStyle(RenderStyle*, Element*) const;
-    virtual bool paintSearchFieldCancelButton(RenderObject*, const PaintInfo&, const IntRect&);
+    virtual bool paintSearchFieldCancelButton(RenderObject*, PaintInfo&, const IntRect&);
 
     virtual void adjustSearchFieldDecorationStyle(RenderStyle*, Element*) const;
 
     virtual void adjustSearchFieldResultsDecorationStyle(RenderStyle*, Element*) const;
-    virtual bool paintSearchFieldResultsDecoration(RenderObject*, const PaintInfo&, const IntRect&);
+    virtual bool paintSearchFieldResultsDecoration(RenderObject*, PaintInfo&, const IntRect&);
 
-    virtual bool paintMediaSliderTrack(RenderObject*, const PaintInfo&, const IntRect&);
-    virtual bool paintMediaVolumeSliderTrack(RenderObject*, const PaintInfo&, const IntRect&);
+    virtual bool paintMediaSliderTrack(RenderObject*, PaintInfo&, const IntRect&);
+    virtual bool paintMediaVolumeSliderTrack(RenderObject*, PaintInfo&, const IntRect&);
     virtual void adjustSliderThumbSize(RenderStyle*, Element*) const;
-    virtual bool paintMediaSliderThumb(RenderObject*, const PaintInfo&, const IntRect&);
-    virtual bool paintMediaToggleClosedCaptionsButton(RenderObject*, const PaintInfo&, const IntRect&);
-    virtual bool paintMediaVolumeSliderThumb(RenderObject*, const PaintInfo&, const IntRect&);
-    virtual bool paintMediaPlayButton(RenderObject*, const PaintInfo&, const IntRect&);
-    virtual bool paintMediaMuteButton(RenderObject*, const PaintInfo&, const IntRect&);
+    virtual bool paintMediaSliderThumb(RenderObject*, PaintInfo&, const IntRect&);
+    virtual bool paintMediaToggleClosedCaptionsButton(RenderObject*, PaintInfo&, const IntRect&);
+    virtual bool paintMediaVolumeSliderThumb(RenderObject*, PaintInfo&, const IntRect&);
+    virtual bool paintMediaPlayButton(RenderObject*, PaintInfo&, const IntRect&);
+    virtual bool paintMediaMuteButton(RenderObject*, PaintInfo&, const IntRect&);
     virtual String formatMediaControlsTime(float time) const;
     virtual String formatMediaControlsCurrentTime(float currentTime, float duration) const;
-    virtual bool paintMediaFullscreenButton(RenderObject*, const PaintInfo&, const IntRect&);
+    virtual bool paintMediaFullscreenButton(RenderObject*, PaintInfo&, const IntRect&);
 
     // MenuList refers to an unstyled menulist (meaning a menulist without
     // background-color or border set) and MenuListButton refers to a styled
@@ -144,12 +144,12 @@ protected:
 
     class DirectionFlippingScope {
     public:
-        DirectionFlippingScope(RenderObject*, const PaintInfo&, const IntRect&);
+        DirectionFlippingScope(RenderObject*, PaintInfo&, const IntRect&);
         ~DirectionFlippingScope();
 
     private:
         bool m_needsFlipping;
-        const PaintInfo& m_paintInfo;
+        PaintInfo& m_paintInfo;
     };
 
 private: