Adding tracking of HWND creation/destruction

chrome/browser/renderer_host/render_widget_host_view_win.cc

 // Copyright (c) 2006-2008 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 "chrome/browser/renderer_host/render_widget_host_view_win.h"
 
 #include "base/command_line.h"
 #include "base/gfx/gdi_util.h"
 #include "base/gfx/rect.h"
 #include "base/histogram.h"
@@ skipping 378 matching lines @@
   }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewWin, private:
 
 LRESULT RenderWidgetHostViewWin::OnCreate(CREATESTRUCT* create_struct) {
   // Call the WM_INPUTLANGCHANGE message handler to initialize the input locale
   // of a browser process.
   OnInputLangChange(0, 0);
+  TRACK_HWND_CREATION(m_hWnd);
   return 0;
 }
 
 void RenderWidgetHostViewWin::OnActivate(UINT action, BOOL minimized,
                                          HWND window) {
   // If the container is a popup, clicking elsewhere on screen should close the
   // popup.
   if (close_on_deactivate_ && action == WA_INACTIVE) {
     // Send a windows message so that any derived classes
     // will get a change to override the default handling
     SendMessage(WM_CANCELMODE);
   }
 }
 
 void RenderWidgetHostViewWin::OnDestroy() {
   ResetTooltip();
   TrackMouseLeave(false);
+  TRACK_HWND_DESTRUCTION(m_hWnd);
 }
 
 void RenderWidgetHostViewWin::OnPaint(HDC dc) {
   DCHECK(render_widget_host_->process()->channel());
 
   CPaintDC paint_dc(m_hWnd);
   HBRUSH white_brush = reinterpret_cast<HBRUSH>(GetStockObject(WHITE_BRUSH));
 
   BackingStore* backing_store = render_widget_host_->GetBackingStore();
 
@@ skipping 543 matching lines @@
     // WM_LBUTTONDOWN.
     SetFocus();
   }
 }
 
 void RenderWidgetHostViewWin::ShutdownHost() {
   shutdown_factory_.RevokeAll();
   render_widget_host_->Shutdown();
   // Do not touch any members at this point, |this| has been deleted.
 }