Add Vector2d classes that represent offsets, instead of using Point.

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

Index: chrome/browser/ui/views/frame/browser_view.cc
diff --git a/chrome/browser/ui/views/frame/browser_view.cc b/chrome/browser/ui/views/frame/browser_view.cc
index c04501bfe0bb3da3aeb890c47b41c0c829dc812c..59eda6790940c599f8e81e82eab4568c10bea1b7 100644
--- a/chrome/browser/ui/views/frame/browser_view.cc
+++ b/chrome/browser/ui/views/frame/browser_view.cc
@@ -459,7 +459,8 @@ gfx::Point BrowserView::OffsetPointForToolbarBackgroundImage(
   // The background image starts tiling horizontally at the window left edge and
   // vertically at the top edge of the horizontal tab strip (or where it would
   // be).  We expect our parent's origin to be the window origin.
-  gfx::Point window_point(point.Add(GetMirroredPosition()));
+  gfx::Point window_point(
+      point.Add(GetMirroredPosition().OffsetFromOrigin()));
   window_point.Offset(frame_->GetThemeBackgroundXInset(),
                       -frame_->GetTabStripInsets(false).top);
   return window_point;