Restore NativeWidgetWin::OnSetIcon to eliminate classic theme titlebar flickering.

OnSetIcon (and OnSetText) were removed in crrev.com/111858.
That was a speculative fix for crbug.com/97808.

DefWindowProc for WM_SETICON does weird non-client painting.
We need a ScopedRedrawLock to avoid flickering on title/icon updates.

TEST=No Windows classic theme titlebar flickering.
BUG=97808,140674

Review URL: https://chromiumcodereview.appspot.com/10826160

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150104 0039d316-1c4b-4281-b951-d872f2087c98

ui/views/widget/native_widget_win.cc

@@ -2006,9 +2006,14 @@ void NativeWidgetWin::OnSetFocus(HWND old_focused_window) {
   SetMsgHandled(FALSE);
 }
 
+LRESULT NativeWidgetWin::OnSetIcon(UINT size_type, HICON new_icon) {
+  // Use a ScopedRedrawLock to avoid weird non-client painting.
+  return DefWindowProcWithRedrawLock(WM_SETICON, size_type,
+                                     reinterpret_cast<LPARAM>(new_icon));
+}
+
 LRESULT NativeWidgetWin::OnSetText(const wchar_t* text) {
-  // DefWindowProc for WM_SETTEXT does weird non-client painting, so we need to
-  // call it inside a ScopedRedrawLock.
+  // Use a ScopedRedrawLock to avoid weird non-client painting.
   return DefWindowProcWithRedrawLock(WM_SETTEXT, NULL,
                                      reinterpret_cast<LPARAM>(text));
 }

ui/views/widget/native_widget_win.h

@@ -361,6 +361,7 @@ class VIEWS_EXPORT NativeWidgetWin : public ui::WindowImpl,
     MSG_WM_PAINT(OnPaint)
     MSG_WM_POWERBROADCAST(OnPowerBroadcast)
     MSG_WM_SETFOCUS(OnSetFocus)
+    MSG_WM_SETICON(OnSetIcon)
     MSG_WM_SETTEXT(OnSetText)
     MSG_WM_SETTINGCHANGE(OnSettingChange)
     MSG_WM_SIZE(OnSize)
@@ -427,6 +428,7 @@ class VIEWS_EXPORT NativeWidgetWin : public ui::WindowImpl,
   virtual LRESULT OnReflectedMessage(UINT msg, WPARAM w_param, LPARAM l_param);
   virtual LRESULT OnSetCursor(UINT message, WPARAM w_param, LPARAM l_param);
   virtual void OnSetFocus(HWND old_focused_window);
+  virtual LRESULT OnSetIcon(UINT size_type, HICON new_icon);
   virtual LRESULT OnSetText(const wchar_t* text);
   virtual void OnSettingChange(UINT flags, const wchar_t* section);
   virtual void OnSize(UINT param, const CSize& size);