Move DIP translation from ui/aura to ui/compositor

ash/dip_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/launcher/launcher.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 44 matching lines @@
 
   ChangeMonitorConfig(2.0f, gfx::Rect(0, 0, 1000, 1000));
 
   window.reset(new aura::Window(NULL));
   window->SetType(aura::client::WINDOW_TYPE_NORMAL);
   window->Init(ui::LAYER_TEXTURED);
   window->SetParent(NULL);
   window->SetBounds(kBoundsInDIP);
   shadow = api.GetShadowForWindow(window.get());
   window->Show();
-  EXPECT_EQ("40,60 800x600", window->GetBoundsInPixel().ToString());
+  EXPECT_EQ("40,60 800x600", window->layer()->GetBoundsInPixel().ToString());
   EXPECT_EQ(layer_bounds_copy.Scale(2.0f).ToString(),
             shadow->layer()->bounds().ToString());
 }
 
 // Test if the WM sets correct work area under different density.
 TEST_F(DIPTest, MAYBE_WorkArea) {
   ChangeMonitorConfig(1.0f, gfx::Rect(0, 0, 1000, 900));
 
   aura::RootWindow* root = Shell::GetRootWindow();
   const gfx::Monitor monitor = gfx::Screen::GetMonitorNearestWindow(root);
@@ skipping 12 matching lines @@
 
   EXPECT_EQ(work_area.ToString(), monitor_2x.work_area().ToString());
 
   Launcher* launcher = Shell::GetInstance()->launcher();
   EXPECT_EQ(
       monitor_2x.bounds().InsetsFrom(work_area).height() * 2,
       launcher->widget()->GetNativeView()->layer()->bounds().height());
 }
 
 }  // namespace ash