Consolidate ShouldUseNativeFrame/AlwaysUseNativeFrame/UseNativeFrame spaghetti.

views/widget/widget_win.cc

 // Copyright (c) 2011 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 "views/widget/widget_win.h"
 
 #include <dwmapi.h>
 
 #include "base/string_util.h"
 #include "base/win/windows_version.h"
@@ skipping 546 matching lines @@
 
   // We need to add ourselves as a message loop observer so that we can repaint
   // aggressively if the contents of our window become invalid. Unfortunately
   // WM_PAINT messages are starved and we get flickery redrawing when resizing
   // if we do not do this.
   MessageLoopForUI::current()->AddObserver(this);
 
   // Windows special DWM window frame requires a special tooltip manager so
   // that window controls in Chrome windows don't flicker when you move your
   // mouse over them. See comment in aero_tooltip_manager.h.
-  if (GetWidget()->GetThemeProvider()->ShouldUseNativeFrame()) {
+  Window* window = GetWidget()->GetContainingWindow();
+  if (window && window->ShouldUseNativeFrame()) {
     tooltip_manager_.reset(new AeroTooltipManager(GetWidget()));
   } else {
     tooltip_manager_.reset(new TooltipManagerWin(GetWidget()));
   }
 
   // This message initializes the window so that focus border are shown for
   // windows.
   SendMessage(
       hwnd(), WM_CHANGEUISTATE, MAKELPARAM(UIS_CLEAR, UISF_HIDEFOCUS), 0);
 
@@ skipping 521 matching lines @@
   POINT zero = {0, 0};
   BLENDFUNCTION blend = {AC_SRC_OVER, 0, layered_alpha_, AC_SRC_ALPHA};
   UpdateLayeredWindow(hwnd(), NULL, &position, &size, dib_dc, &zero,
                       RGB(0xFF, 0xFF, 0xFF), &blend, ULW_ALPHA);
   layered_window_invalid_rect_.SetRect(0, 0, 0, 0);
   layered_window_contents_->endPlatformPaint();
 }
 
 void WidgetWin::ClientAreaSizeChanged() {
   RECT r;
-  if (GetWidget()->GetThemeProvider()->ShouldUseNativeFrame() || IsZoomed())
+  Window* window = GetWidget()->GetContainingWindow();
+  if (IsZoomed() || (window && window->ShouldUseNativeFrame()))
     GetClientRect(&r);
   else
     GetWindowRect(&r);
   gfx::Size s(std::max(0, static_cast<int>(r.right - r.left)),
               std::max(0, static_cast<int>(r.bottom - r.top)));
   delegate_->OnSizeChanged(s);
   if (use_layered_buffer_) {
     layered_window_contents_.reset(
         new gfx::CanvasSkia(s.width(), s.height(), false));
   }
@@ skipping 147 matching lines @@
 
   // And now, notify them that they have a brand new parent.
   for (NativeWidgets::iterator it = widgets.begin();
        it != widgets.end(); ++it) {
     (*it)->GetWidget()->NotifyNativeViewHierarchyChanged(true,
                                                          new_parent);
   }
 }
 
 }  // namespace views