Remove PlatformMouseEvent and use WebMouseEvent instead

third_party/WebKit/Source/platform/WebMouseEvent.cpp

Index: third_party/WebKit/Source/platform/WebMouseEvent.cpp
diff --git a/third_party/WebKit/Source/platform/WebMouseEvent.cpp b/third_party/WebKit/Source/platform/WebMouseEvent.cpp
index 4e6e9575f02fe7c06f1faa9072933c13d484ebdd..8e297fa165b3b6574d0b8c73e9c0f53c27a206fe 100644
--- a/third_party/WebKit/Source/platform/WebMouseEvent.cpp
+++ b/third_party/WebKit/Source/platform/WebMouseEvent.cpp
@@ -4,8 +4,28 @@
 
 #include "public/platform/WebMouseEvent.h"
 
+#include "public/platform/WebGestureEvent.h"
+
 namespace blink {
 
+WebMouseEvent::WebMouseEvent(WebInputEvent::Type type,
+                             const WebGestureEvent& gestureEvent,
+                             Button buttonParam,
+                             int clickCountParam,
+                             int modifiers,
+                             double timeStampSeconds)
+    : WebInputEvent(sizeof(WebMouseEvent), type, modifiers, timeStampSeconds),
+      WebPointerProperties(buttonParam,
+                           WebPointerProperties::PointerType::Mouse),
+      x(gestureEvent.x),
+      y(gestureEvent.y),
+      globalX(gestureEvent.globalX),
+      globalY(gestureEvent.globalY),
+      clickCount(clickCountParam) {
+  setFrameScale(gestureEvent.frameScale());
+  setFrameTranslate(gestureEvent.frameTranslate());
+}
+
 WebFloatPoint WebMouseEvent::movementInRootFrame() const {
   return WebFloatPoint((movementX / m_frameScale), (movementY / m_frameScale));
 }
@@ -15,6 +35,12 @@ WebFloatPoint WebMouseEvent::positionInRootFrame() const {
                        (y / m_frameScale) + m_frameTranslate.y);
 }
 
+WebMouseEvent WebMouseEvent::flattenTransform() const {
+  WebMouseEvent result = *this;
+  result.flattenTransformSelf();
+  return result;
+}
+
 void WebMouseEvent::flattenTransformSelf() {
   x = (x / m_frameScale) + m_frameTranslate.x;
   y = (y / m_frameScale) + m_frameTranslate.y;