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

chrome/browser/automation/testing_automation_provider_gtk.cc

Index: chrome/browser/automation/testing_automation_provider_gtk.cc
diff --git a/chrome/browser/automation/testing_automation_provider_gtk.cc b/chrome/browser/automation/testing_automation_provider_gtk.cc
index 83f98433276d36270208a0dbaa80a368cd020f80..dd380a601050cd2dcf9255654d377950976b817c 100644
--- a/chrome/browser/automation/testing_automation_provider_gtk.cc
+++ b/chrome/browser/automation/testing_automation_provider_gtk.cc
@@ -35,16 +35,16 @@ void TestingAutomationProvider::WindowGetViewBounds(int handle,
     GtkAllocation allocation;
     gtk_widget_get_allocation(widget, &allocation);
     *bounds = gfx::Rect(allocation.width, allocation.height);
-    gint x, y;
+    gfx::Point origin;
     if (screen_coordinates) {
-      gfx::Point point = ui::GetWidgetScreenPosition(widget);
-      x = point.x();
-      y = point.y();
+      origin = gfx::PointAtOffsetFromOrigin(ui::GetWidgetScreenOffset(widget));
     } else {
+      gint x, y;
       gtk_widget_translate_coordinates(widget, GTK_WIDGET(window),
                                        0, 0, &x, &y);
+      origin = gfx::Point(x, y);
     }
-    bounds->set_origin(gfx::Point(x, y));
+    bounds->set_origin(origin);
   }
 }