Handle floating point coordinates from ozone to exosphere

ui/aura/window.cc

Index: ui/aura/window.cc
diff --git a/ui/aura/window.cc b/ui/aura/window.cc
index 83a532b0524371c09cd0bb47625a93eedcd6e9f9..def9ce0094c40a02471f73b72b2ad563ee48a87a 100644
--- a/ui/aura/window.cc
+++ b/ui/aura/window.cc
@@ -432,6 +432,15 @@ const Window* Window::GetChildById(int id) const {
 void Window::ConvertPointToTarget(const Window* source,
                                   const Window* target,
                                   gfx::Point* point) {
+  gfx::PointF point_f(*point);
+  ConvertPointToTargetF(source, target, &point_f);
+  *point = gfx::ToFlooredPoint(point_f);
+}
+
+// static
+void Window::ConvertPointToTargetF(const Window* source,
+                                   const Window* target,
+                                   gfx::PointF* point) {
   if (!source)
     return;
   if (source->GetRootWindow() != target->GetRootWindow()) {
@@ -439,15 +448,15 @@ void Window::ConvertPointToTarget(const Window* source,
         client::GetScreenPositionClient(source->GetRootWindow());
     // |source_client| can be NULL in tests.
     if (source_client)
-      source_client->ConvertPointToScreen(source, point);
+      source_client->ConvertPointToScreenF(source, point);
 
     client::ScreenPositionClient* target_client =
         client::GetScreenPositionClient(target->GetRootWindow());
     // |target_client| can be NULL in tests.
     if (target_client)
-      target_client->ConvertPointFromScreen(target, point);
+      target_client->ConvertPointFromScreenF(target, point);
   } else {
-    ui::Layer::ConvertPointToLayer(source->layer(), target->layer(), point);
+    ui::Layer::ConvertPointToLayerF(source->layer(), target->layer(), point);
   }
 }