Revert 124790 - Minimized panels should not open on Windows when activated by the OS

chrome/browser/ui/panels/panel_browser_view.cc

Index: chrome/browser/ui/panels/panel_browser_view.cc
===================================================================
--- chrome/browser/ui/panels/panel_browser_view.cc	(revision 124794)
+++ chrome/browser/ui/panels/panel_browser_view.cc	(working copy)
@@ -303,23 +303,6 @@
   return IsActive();
 }
 
-void PanelBrowserView::PreventActivationByOS(bool prevent_activation) {
-  // Set the flags "NoActivate" and "AppWindow" to make sure
-  // the minimized panels do not get activated by the OS, but
-  // do appear in the taskbar and Alt-Tab menu.
-  gfx::NativeWindow native_window = GetNativePanelHandle();
-  int style = ::GetWindowLong(native_window, GWL_EXSTYLE);
-
-  if (prevent_activation)
-    ::SetWindowLong(native_window, GWL_EXSTYLE,
-        style |  WS_EX_NOACTIVATE | WS_EX_APPWINDOW);
-  else // allow activation
-    ::SetWindowLong(native_window, GWL_EXSTYLE,
-        style & ~WS_EX_NOACTIVATE & ~WS_EX_APPWINDOW);
-
-}
-
-
 gfx::NativeWindow PanelBrowserView::GetNativePanelHandle() {
   return GetNativeHandle();
 }