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 5c70d2796178cebd75e217468bee3db0d1e0103d..915cab85c6825f5cd32ac1b43389a6be5fd1cde8 100644
--- a/chrome/browser/ui/views/frame/browser_view.cc
+++ b/chrome/browser/ui/views/frame/browser_view.cc
@@ -466,7 +466,8 @@ 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;