Move more message handlers from NativeWidgetWin to HWNDMessageHandler.

Buildbots (not trybots) were giving grief on past iteration of this CL:
http://codereview.chromium.org/10832345/
... so I am splitting it into smaller pieces to help identify what piece was the cause.

http://crbug.com/142962
TBR=sky@chromium.org
Review URL: https://chromiumcodereview.appspot.com/10828395

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152384 0039d316-1c4b-4281-b951-d872f2087c98

ui/views/widget/hwnd_message_handler.cc

@@ -280,6 +280,13 @@ LRESULT HWNDMessageHandler::OnSetText(const wchar_t* text) {
                                      reinterpret_cast<LPARAM>(text));
 }
 
+void HWNDMessageHandler::OnSize(UINT param, const CSize& size) {
+  RedrawWindow(hwnd(), NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN);
+  // ResetWindowRegion is going to trigger WM_NCPAINT. By doing it after we've
+  // invoked OnSize we ensure the RootView has been laid out.
+  ResetWindowRegion(false);
+}
+
 void HWNDMessageHandler::OnThemeChanged() {
   ui::NativeThemeWin::instance()->CloseHandles();
 }
@@ -290,6 +297,48 @@ void HWNDMessageHandler::OnVScroll(int scroll_type,
   SetMsgHandled(FALSE);
 }
 
+void HWNDMessageHandler::ResetWindowRegion(bool force) {
+  // A native frame uses the native window region, and we don't want to mess
+  // with it.
+  if (!delegate_->IsUsingCustomFrame() || !delegate_->IsWidgetWindow()) {
+    if (force)
+      SetWindowRgn(hwnd(), NULL, TRUE);
+    return;
+  }
+
+  // Changing the window region is going to force a paint. Only change the
+  // window region if the region really differs.
+  HRGN current_rgn = CreateRectRgn(0, 0, 0, 0);
+  int current_rgn_result = GetWindowRgn(hwnd(), current_rgn);
+
+  CRect window_rect;
+  GetWindowRect(hwnd(), &window_rect);
+  HRGN new_region;
+  if (delegate_->AsNativeWidgetWin()->IsMaximized()) {
+    HMONITOR monitor = MonitorFromWindow(hwnd(), MONITOR_DEFAULTTONEAREST);
+    MONITORINFO mi;
+    mi.cbSize = sizeof mi;
+    GetMonitorInfo(monitor, &mi);
+    CRect work_rect = mi.rcWork;
+    work_rect.OffsetRect(-window_rect.left, -window_rect.top);
+    new_region = CreateRectRgnIndirect(&work_rect);
+  } else {
+    gfx::Path window_mask;
+    delegate_->GetWindowMask(
+        gfx::Size(window_rect.Width(), window_rect.Height()), &window_mask);
+    new_region = window_mask.CreateNativeRegion();
+  }
+
+  if (current_rgn_result == ERROR || !EqualRgn(current_rgn, new_region)) {
+    // SetWindowRgn takes ownership of the HRGN created by CreateNativeRegion.
+    SetWindowRgn(hwnd(), new_region, TRUE);
+  } else {
+    DeleteObject(new_region);
+  }
+
+  DeleteObject(current_rgn);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // HWNDMessageHandler, private:
 

ui/views/widget/hwnd_message_handler.h

@@ -65,6 +65,7 @@ class VIEWS_EXPORT HWNDMessageHandler {
   void OnSetFocus(HWND last_focused_window);
   LRESULT OnSetIcon(UINT size_type, HICON new_icon);
   LRESULT OnSetText(const wchar_t* text);
+  void OnSize(UINT param, const CSize& size);
   void OnThemeChanged();
   void OnVScroll(int scroll_type, short position, HWND scrollbar);
 
@@ -74,6 +75,11 @@ class VIEWS_EXPORT HWNDMessageHandler {
     remove_standard_frame_ = remove_standard_frame;
   }
 
+  // Resets the window region for the current widget bounds if necessary.
+  // If |force| is true, the window region is reset to NULL even for native
+  // frame windows.
+  void ResetWindowRegion(bool force);
+
  private:
   // TODO(beng): This won't be a style violation once this object becomes the
   //             WindowImpl.

ui/views/widget/native_widget_win.cc

@@ -544,7 +544,7 @@ NonClientFrameView* NativeWidgetWin::CreateNonClientFrameView() {
 
 void NativeWidgetWin::UpdateFrameAfterFrameChange() {
   // We've either gained or lost a custom window region, so reset it now.
-  ResetWindowRegion(true);
+  message_handler_->ResetWindowRegion(true);
 }
 
 bool NativeWidgetWin::ShouldUseNativeFrame() const {
@@ -1906,10 +1906,7 @@ void NativeWidgetWin::OnSettingChange(UINT flags, const wchar_t* section) {
 }
 
 void NativeWidgetWin::OnSize(UINT param, const CSize& size) {
-  RedrawWindow(GetNativeView(), NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN);
-  // ResetWindowRegion is going to trigger WM_NCPAINT. By doing it after we've
-  // invoked OnSize we ensure the RootView has been laid out.
-  ResetWindowRegion(false);
+  message_handler_->OnSize(param, size);
 }
 
 void NativeWidgetWin::OnSysCommand(UINT notification_code, CPoint click) {
@@ -2500,49 +2497,6 @@ void NativeWidgetWin::UpdateDWMFrame() {
   DwmExtendFrameIntoClientArea(GetNativeView(), &m);
 }
 
-void NativeWidgetWin::ResetWindowRegion(bool force) {
-  // A native frame uses the native window region, and we don't want to mess
-  // with it.
-  if (GetWidget()->ShouldUseNativeFrame() || !GetWidget()->non_client_view()) {
-    if (force)
-      SetWindowRgn(NULL, TRUE);
-    return;
-  }
-
-  // Changing the window region is going to force a paint. Only change the
-  // window region if the region really differs.
-  HRGN current_rgn = CreateRectRgn(0, 0, 0, 0);
-  int current_rgn_result = GetWindowRgn(GetNativeView(), current_rgn);
-
-  CRect window_rect;
-  GetWindowRect(&window_rect);
-  HRGN new_region;
-  if (IsMaximized()) {
-    HMONITOR monitor =
-        MonitorFromWindow(GetNativeView(), MONITOR_DEFAULTTONEAREST);
-    MONITORINFO mi;
-    mi.cbSize = sizeof mi;
-    GetMonitorInfo(monitor, &mi);
-    CRect work_rect = mi.rcWork;
-    work_rect.OffsetRect(-window_rect.left, -window_rect.top);
-    new_region = CreateRectRgnIndirect(&work_rect);
-  } else {
-    gfx::Path window_mask;
-    GetWidget()->non_client_view()->GetWindowMask(
-        gfx::Size(window_rect.Width(), window_rect.Height()), &window_mask);
-    new_region = window_mask.CreateNativeRegion();
-  }
-
-  if (current_rgn_result == ERROR || !EqualRgn(current_rgn, new_region)) {
-    // SetWindowRgn takes ownership of the HRGN created by CreateNativeRegion.
-    SetWindowRgn(new_region, TRUE);
-  } else {
-    DeleteObject(new_region);
-  }
-
-  DeleteObject(current_rgn);
-}
-
 LRESULT NativeWidgetWin::DefWindowProcWithRedrawLock(UINT message,
                                                      WPARAM w_param,
                                                      LPARAM l_param) {

ui/views/widget/native_widget_win.h

@@ -542,11 +542,6 @@ class VIEWS_EXPORT NativeWidgetWin : public ui::WindowImpl,
   // or subsequently.
   void ClientAreaSizeChanged();
 
-  // Resets the window region for the current widget bounds if necessary.
-  // If |force| is true, the window region is reset to NULL even for native
-  // frame windows.
-  void ResetWindowRegion(bool force);
-
   // When removing the standard frame, tells the DWM how much glass we want on
   // the edges. Currently hardcoded to 10px on all sides.
   void UpdateDWMFrame();