Move WebMouseEvent into its own header file.

third_party/WebKit/public/platform/WebInputEvent.h

Index: third_party/WebKit/public/platform/WebInputEvent.h
diff --git a/third_party/WebKit/public/platform/WebInputEvent.h b/third_party/WebKit/public/platform/WebInputEvent.h
index 82b34ff314f3694897cd508bcb25fce5e813ae61..50e8805166fa39e5b7b6baf49bb5e9d354ff1f9d 100644
--- a/third_party/WebKit/public/platform/WebInputEvent.h
+++ b/third_party/WebKit/public/platform/WebInputEvent.h
@@ -400,53 +400,6 @@ class WebKeyboardEvent : public WebInputEvent {
   }
 };
 
-// WebMouseEvent --------------------------------------------------------------
-
-class WebMouseEvent : public WebInputEvent, public WebPointerProperties {
- public:
-  // Renderer coordinates. Similar to viewport coordinates but without
-  // DevTools emulation transform or overscroll applied. i.e. the coordinates
-  // in Chromium's RenderView bounds.
-  int x;
-  int y;
-
-  // DEPRECATED (crbug.com/507787)
-  int windowX;
-  int windowY;
-
-  // Screen coordinate
-  int globalX;
-  int globalY;
-
-  int movementX;
-  int movementY;
-  int clickCount;
-
-  WebMouseEvent(Type type, int modifiers, double timeStampSeconds)
-      : WebInputEvent(sizeof(WebMouseEvent), type, modifiers, timeStampSeconds),
-        WebPointerProperties() {}
-
-  WebMouseEvent()
-      : WebInputEvent(sizeof(WebMouseEvent)), WebPointerProperties() {}
-
-#if INSIDE_BLINK
-  BLINK_PLATFORM_EXPORT WebFloatPoint movementInRootFrame() const;
-  BLINK_PLATFORM_EXPORT WebFloatPoint positionInRootFrame() const;
-#endif
-
- protected:
-  explicit WebMouseEvent(unsigned sizeParam)
-      : WebInputEvent(sizeParam), WebPointerProperties() {}
-
-  WebMouseEvent(unsigned sizeParam,
-                Type type,
-                int modifiers,
-                double timeStampSeconds)
-      : WebInputEvent(sizeParam, type, modifiers, timeStampSeconds),
-        WebPointerProperties() {}
-  void flattenTransformSelf();
-};
-
 // WebTouchEvent --------------------------------------------------------------
 
 // TODO(e_hakkinen): Replace with WebPointerEvent. crbug.com/508283