Add origin() method on View and use it to simplify some callers.

ui/views/window/dialog_client_view_unittest.cc

Index: ui/views/window/dialog_client_view_unittest.cc
diff --git a/ui/views/window/dialog_client_view_unittest.cc b/ui/views/window/dialog_client_view_unittest.cc
index dfe45b562370dae7cf8f7a9d8dd89f83857c7647..e1f28b4dc35bf06d7129836c5d004f2e59000ffb 100644
--- a/ui/views/window/dialog_client_view_unittest.cc
+++ b/ui/views/window/dialog_client_view_unittest.cc
@@ -83,7 +83,7 @@ class DialogClientViewTest : public ViewsTestBase,
     const gfx::Size preferred_size = this->GetPreferredSize();
     EXPECT_EQ(preferred_size.height(), this->bounds().height());
     EXPECT_LE(preferred_size.width(), this->bounds().width());
-    EXPECT_EQ(this->bounds().origin(), client_bounds.origin());
+    EXPECT_EQ(this->origin(), client_bounds.origin());
     EXPECT_EQ(this->bounds().right(), client_bounds.right());
   }