Make GetRootWindow() return a Window instead of a RootWindow.

chrome/test/base/interactive_test_utils_win.cc

Index: chrome/test/base/interactive_test_utils_win.cc
diff --git a/chrome/test/base/interactive_test_utils_win.cc b/chrome/test/base/interactive_test_utils_win.cc
index 345d48b0675e7e66eb328a9cde977163091f7faa..7a4f747aaaa3303683c1be4b0752f876bb201450 100644
--- a/chrome/test/base/interactive_test_utils_win.cc
+++ b/chrome/test/base/interactive_test_utils_win.cc
@@ -29,7 +29,7 @@ void HideNativeWindow(gfx::NativeWindow window) {
     HideNativeWindowAura(window);
     return;
   }
-  HWND hwnd = window->GetRootWindow()->GetAcceleratedWidget();
+  HWND hwnd = window->GetDispatcher()->GetAcceleratedWidget();
 #else
   HWND hwnd = window;
 #endif
@@ -43,7 +43,7 @@ bool ShowAndFocusNativeWindow(gfx::NativeWindow window) {
     ShowAndFocusNativeWindowAura(window);
   window->Show();
   // Always make sure the window hosting ash is visible and focused.
-  HWND hwnd = window->GetRootWindow()->GetAcceleratedWidget();
+  HWND hwnd = window->GetDispatcher()->GetAcceleratedWidget();
 #else
   HWND hwnd = window;
 #endif