Remove PlatformGestureEvent in favour of using WebGestureEvent

third_party/WebKit/Source/platform/scroll/Scrollbar.h

Index: third_party/WebKit/Source/platform/scroll/Scrollbar.h
diff --git a/third_party/WebKit/Source/platform/scroll/Scrollbar.h b/third_party/WebKit/Source/platform/scroll/Scrollbar.h
index 2eb8b1e1b64edc4ad85ee2044a0b368b98cfef6a..95caaccfe6d0dcc4141036d1aa78e82a57b54396 100644
--- a/third_party/WebKit/Source/platform/scroll/Scrollbar.h
+++ b/third_party/WebKit/Source/platform/scroll/Scrollbar.h
@@ -39,10 +39,10 @@ namespace blink {
 class GraphicsContext;
 class HostWindow;
 class IntRect;
-class PlatformGestureEvent;
 class PlatformMouseEvent;
 class ScrollableArea;
 class ScrollbarTheme;
+class WebGestureEvent;
 
 class PLATFORM_EXPORT Scrollbar : public Widget,
                                   public ScrollbarThemeClient,
@@ -138,7 +138,7 @@ class PLATFORM_EXPORT Scrollbar : public Widget,
   // Return if the gesture event was handled. |shouldUpdateCapture|
   // will be set to true if the handler should update the capture
   // state for this scrollbar.
-  bool gestureEvent(const PlatformGestureEvent&, bool* shouldUpdateCapture);
+  bool gestureEvent(const WebGestureEvent&, bool* shouldUpdateCapture);
 
   // These methods are used for platform scrollbars to give :hover feedback.
   // They will not get called when the mouse went down in a scrollbar, since it