Move us fully from gfx:: over to skia types for consistency.

remoting/host/event_executor_mac.cc

Index: remoting/host/event_executor_mac.cc
diff --git a/remoting/host/event_executor_mac.cc b/remoting/host/event_executor_mac.cc
index 0ca50aff3583957dff55e0396fac4a17ee2f8113..512d7633758c18f25e1ecdb1532abe9982ace257 100644
--- a/remoting/host/event_executor_mac.cc
+++ b/remoting/host/event_executor_mac.cc
@@ -231,7 +231,7 @@ void EventExecutorMac::InjectMouseEvent(const MouseEvent& event) {
     // TODO(wez): This code assumes that MouseEvent(0,0) (top-left of client view)
     // corresponds to local (0,0) (top-left of primary monitor).  That won't in
     // general be true on multi-monitor systems, though.
-    gfx::Size size = capturer_->size_most_recent();
+    SkISize size = capturer_->size_most_recent();
     if (event.x() >= 0 || event.y() >= 0 ||
         event.x() < size.width() || event.y() < size.height()) {
       VLOG(3) << "Moving mouse to " << event.x() << "," << event.y();