Remove PlatformMouseEvent and use WebMouseEvent instead

third_party/WebKit/Source/core/page/AutoscrollController.h

Index: third_party/WebKit/Source/core/page/AutoscrollController.h
diff --git a/third_party/WebKit/Source/core/page/AutoscrollController.h b/third_party/WebKit/Source/core/page/AutoscrollController.h
index aab9602b556b8e82be2e8816bd4aa46b459fbc7f..5ab08a0267b8591ab67de26d5c2fb5416d3a7a46 100644
--- a/third_party/WebKit/Source/core/page/AutoscrollController.h
+++ b/third_party/WebKit/Source/core/page/AutoscrollController.h
@@ -38,9 +38,9 @@ class LocalFrame;
 class FrameView;
 class Node;
 class Page;
-class PlatformMouseEvent;
 class LayoutBox;
 class LayoutObject;
+class WebMouseEvent;
 
 enum AutoscrollType {
   NoAutoscroll,
@@ -72,7 +72,7 @@ class CORE_EXPORT AutoscrollController final
                          const IntPoint& eventPosition,
                          TimeTicks eventTime);
   void handleMouseReleaseForMiddleClickAutoscroll(LocalFrame*,
-                                                  const PlatformMouseEvent&);
+                                                  const WebMouseEvent&);
   void startMiddleClickAutoscroll(LayoutBox*, const IntPoint&);
 
  private: