gfx: Make conversions from gfx::Point to PointF explicit.

chrome/browser/ui/views/frame/browser_root_view.cc

Index: chrome/browser/ui/views/frame/browser_root_view.cc
diff --git a/chrome/browser/ui/views/frame/browser_root_view.cc b/chrome/browser/ui/views/frame/browser_root_view.cc
index 13125e58f45635cd21557e0a28b6db604000df07..88b34e23db1095dba4fff8d035fb1930f1d0aa2b 100644
--- a/chrome/browser/ui/views/frame/browser_root_view.cc
+++ b/chrome/browser/ui/views/frame/browser_root_view.cc
@@ -181,7 +181,8 @@ ui::DropTargetEvent* BrowserRootView::MapEventToTabStrip(
     const ui::OSExchangeData& data) {
   gfx::Point tab_strip_loc(event.location());
   ConvertPointToTarget(this, tabstrip(), &tab_strip_loc);
-  return new ui::DropTargetEvent(data, tab_strip_loc, tab_strip_loc,
+  return new ui::DropTargetEvent(data, gfx::PointF(tab_strip_loc),
+                                 gfx::PointF(tab_strip_loc),
                                  event.source_operations());
 }