aura: Take transformation into account when computing window bounds in root-window/screen.

ash/wm/overview/window_selector_unittest.cc

Index: ash/wm/overview/window_selector_unittest.cc
diff --git a/ash/wm/overview/window_selector_unittest.cc b/ash/wm/overview/window_selector_unittest.cc
index c23fedc189d4d293b3ed92475c59743b5e19f62a..8d2bcb4977512510e043eb82cf421064cd5efec1 100644
--- a/ash/wm/overview/window_selector_unittest.cc
+++ b/ash/wm/overview/window_selector_unittest.cc
@@ -198,20 +198,6 @@ class WindowSelectorTest : public test::AshTestBase {
     return bounds;
   }
 
-  gfx::RectF GetTransformedBoundsInRootWindow(aura::Window* window) {
-    gfx::RectF bounds = gfx::Rect(window->bounds().size());
-    aura::Window* root = window->GetRootWindow();
-    CHECK(window->layer());
-    CHECK(root->layer());
-    gfx::Transform transform;
-    if (!window->layer()->GetTargetTransformRelativeTo(root->layer(),
-                                                       &transform)) {
-      return gfx::RectF();
-    }
-    transform.TransformRect(&bounds);
-    return bounds;
-  }
-
   void ClickWindow(aura::Window* window) {
     aura::test::EventGenerator event_generator(window->GetRootWindow(), window);
     gfx::RectF target = GetTransformedBounds(window);
@@ -1051,15 +1037,15 @@ TEST_F(WindowSelectorTest, HitTestingInOverview) {
   scoped_ptr<aura::Window> window2(CreateWindow(window_bounds));
 
   ToggleOverview();
-  gfx::RectF bounds1 = GetTransformedBoundsInRootWindow(window1.get());
-  gfx::RectF bounds2 = GetTransformedBoundsInRootWindow(window2.get());
+  gfx::Rect bounds1 = window1->GetBoundsInRootWindow();
+  gfx::Rect bounds2 = window2->GetBoundsInRootWindow();
   EXPECT_NE(bounds1.ToString(), bounds2.ToString());
 
   ui::EventTarget* root_target = root_window;
   ui::EventTargeter* targeter = root_target->GetEventTargeter();
   aura::Window* windows[] = { window1.get(), window2.get() };
   for (size_t w = 0; w < arraysize(windows); ++w) {
-    gfx::RectF bounds = GetTransformedBoundsInRootWindow(windows[w]);
+    gfx::Rect bounds = windows[w]->GetBoundsInRootWindow();
     gfx::Point points[] = {
       gfx::Point(bounds.x(), bounds.y()),
       gfx::Point(bounds.right() - 1, bounds.y()),