Overlay scrollbars flush with window edge

third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp

Index: third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp
diff --git a/third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp b/third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp
index 45c1d47b252270283f021038985533db4ad76a8d..8ca6b40216ce5384854f9f46b46769c3c3ec3224 100644
--- a/third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp
+++ b/third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp
@@ -314,7 +314,8 @@ bool ScrollbarThemeAura::shouldRepaintAllPartsOnInvalidation() const {
 ScrollbarPart ScrollbarThemeAura::invalidateOnThumbPositionChange(
     const ScrollbarThemeClient& scrollbar,
     float oldPosition,
-    float newPosition) const {
+    float newPosition,
+    bool hitBeginOrEndChanged) const {
   ScrollbarPart invalidParts = NoPart;
   ASSERT(buttonsPlacement() == WebScrollbarButtonsPlacementSingle);
   static const ScrollbarPart kButtonParts[] = {BackButtonStartPart,
@@ -336,7 +337,7 @@ bool ScrollbarThemeAura::hasScrollbarButtons(
   }
   return !themeEngine->getSize(WebThemeEngine::PartScrollbarLeftArrow)
               .isEmpty();
-};
+}
 
 IntSize ScrollbarThemeAura::buttonSize(const ScrollbarThemeClient& scrollbar) {
   if (!hasScrollbarButtons(scrollbar.orientation()))