Makes NativeViewHostWin change the parent of the hwnd when

content/browser/web_contents/web_contents_view_win.cc

Index: content/browser/web_contents/web_contents_view_win.cc
diff --git a/content/browser/web_contents/web_contents_view_win.cc b/content/browser/web_contents/web_contents_view_win.cc
index 8f14e28a811594b3f1991e03c2bfb0ed775d5378..23a0734551973349be08d789cd533736bc2f5867 100644
--- a/content/browser/web_contents/web_contents_view_win.cc
+++ b/content/browser/web_contents/web_contents_view_win.cc
@@ -15,6 +15,7 @@
 #include "content/browser/web_contents/web_drag_dest_win.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_view_delegate.h"
+#include "ui/base/win/hidden_window.h"
 #include "ui/base/win/hwnd_subclass.h"
 #include "ui/gfx/screen.h"
 
@@ -37,43 +38,6 @@ WebContentsView* CreateWebContentsView(
 
 namespace {
 
-// We need to have a parent window for the compositing code to work correctly.
-//
-// A tab will not have a parent HWND whenever it is not active in its
-// host window - for example at creation time and when it's in the
-// background, so we provide a default widget to host them.
-//
-// It may be tempting to use GetDesktopWindow() instead, but this is
-// problematic as the shell sends messages to children of the desktop
-// window that interact poorly with us.
-//
-// See: http://crbug.com/16476
-class TempParent : public ui::WindowImpl {
- public:
-  static TempParent* Get() {
-    static TempParent* g_temp_parent;
-    if (!g_temp_parent) {
-      g_temp_parent = new TempParent();
-
-      g_temp_parent->set_window_style(WS_POPUP);
-      g_temp_parent->set_window_ex_style(WS_EX_TOOLWINDOW);
-      g_temp_parent->Init(GetDesktopWindow(), gfx::Rect());
-      EnableWindow(g_temp_parent->hwnd(), FALSE);
-    }
-    return g_temp_parent;
-  }
-
- private:
-  // Explicitly do nothing in Close. We do this as some external apps may get a
-  // handle to this window and attempt to close it.
-  void OnClose() {
-  }
-
-  BEGIN_MSG_MAP_EX(WebContentsViewWin)
-    MSG_WM_CLOSE(OnClose)
-  END_MSG_MAP()
-};
-
 typedef std::map<HWND, WebContentsViewWin*> HwndToWcvMap;
 HwndToWcvMap hwnd_to_wcv_map;
 
@@ -151,7 +115,7 @@ void WebContentsViewWin::CreateView(const gfx::Size& initial_size) {
 
   set_window_style(WS_VISIBLE | WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS);
 
-  Init(TempParent::Get()->hwnd(), gfx::Rect(initial_size_));
+  Init(ui::GetHiddenWindow(), gfx::Rect(initial_size_));
 
   // Remove the root view drop target so we can register our own.
   RevokeDragDrop(GetNativeView());