Prepare SyntheticPointerAction to handle mouse actions

content/browser/renderer_host/input/synthetic_mouse_pointer.cc

Index: content/browser/renderer_host/input/synthetic_mouse_pointer.cc
diff --git a/content/browser/renderer_host/input/synthetic_mouse_pointer.cc b/content/browser/renderer_host/input/synthetic_mouse_pointer.cc
index 556d1fe36ed2dfa37630788eb96470258082afb6..2dd8cbb4c5b0e015167863139f4c22db9ee7f875 100644
--- a/content/browser/renderer_host/input/synthetic_mouse_pointer.cc
+++ b/content/browser/renderer_host/input/synthetic_mouse_pointer.cc
@@ -33,9 +33,12 @@ void SyntheticMousePointer::Move(int index,
                                  float y,
                                  SyntheticGestureTarget* target,
                                  const base::TimeTicks& timestamp) {
+  blink::WebMouseEvent::Button button = mouse_event_.button;
+  int click_count = mouse_event_.clickCount;
   mouse_event_ = SyntheticWebMouseEventBuilder::Build(
       blink::WebInputEvent::MouseMove, x, y, 0);
-  mouse_event_.button = blink::WebMouseEvent::ButtonLeft;
+  mouse_event_.button = button;
+  mouse_event_.clickCount = click_count;
 }
 
 void SyntheticMousePointer::Release(int index,