Move last of event handlers down to NativeWidgetWin/Gtk.

views/widget/native_widget_win.cc

Index: views/widget/native_widget_win.cc
===================================================================
--- views/widget/native_widget_win.cc	(revision 88384)
+++ views/widget/native_widget_win.cc	(working copy)
@@ -5,9 +5,12 @@
 #include "views/widget/native_widget_win.h"
 
 #include <dwmapi.h>
+#include <shellapi.h>
 
 #include "base/string_util.h"
 #include "base/system_monitor/system_monitor.h"
+#include "base/win/scoped_gdi_object.h"
+#include "base/win/win_util.h"
 #include "base/win/windows_version.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/base/dragdrop/drag_source.h"
@@ -19,6 +22,7 @@
 #include "ui/base/view_prop.h"
 #include "ui/base/win/hwnd_util.h"
 #include "ui/gfx/canvas_skia.h"
+#include "ui/gfx/canvas_skia_paint.h"
 #include "ui/gfx/icon_util.h"
 #include "ui/gfx/native_theme_win.h"
 #include "ui/gfx/path.h"
@@ -199,6 +203,68 @@
   return TRUE;
 }
 
+// See comments in OnNCPaint() for details of this struct.
+struct ClipState {
+  // The window being painted.
+  HWND parent;
+
+  // DC painting to.
+  HDC dc;
+
+  // Origin of the window in terms of the screen.
+  int x;
+  int y;
+};
+
+// See comments in OnNCPaint() for details of this function.
+static BOOL CALLBACK ClipDCToChild(HWND window, LPARAM param) {
+  ClipState* clip_state = reinterpret_cast<ClipState*>(param);
+  if (GetParent(window) == clip_state->parent && IsWindowVisible(window)) {
+    RECT bounds;
+    GetWindowRect(window, &bounds);
+    ExcludeClipRect(clip_state->dc,
+      bounds.left - clip_state->x,
+      bounds.top - clip_state->y,
+      bounds.right - clip_state->x,
+      bounds.bottom - clip_state->y);
+  }
+  return TRUE;
+}
+
+// The thickness of an auto-hide taskbar in pixels.
+static const int kAutoHideTaskbarThicknessPx = 2;
+
+bool GetMonitorAndRects(const RECT& rect,
+                        HMONITOR* monitor,
+                        gfx::Rect* monitor_rect,
+                        gfx::Rect* work_area) {
+  DCHECK(monitor);
+  DCHECK(monitor_rect);
+  DCHECK(work_area);
+  *monitor = MonitorFromRect(&rect, MONITOR_DEFAULTTONULL);
+  if (!*monitor)
+    return false;
+  MONITORINFO monitor_info = { 0 };
+  monitor_info.cbSize = sizeof(monitor_info);
+  GetMonitorInfo(*monitor, &monitor_info);
+  *monitor_rect = monitor_info.rcMonitor;
+  *work_area = monitor_info.rcWork;
+  return true;
+}
+
+// Returns true if edge |edge| (one of ABE_LEFT, TOP, RIGHT, or BOTTOM) of
+// monitor |monitor| has an auto-hiding taskbar that's always-on-top.
+bool EdgeHasTopmostAutoHideTaskbar(UINT edge, HMONITOR monitor) {
+  APPBARDATA taskbar_data = { 0 };
+  taskbar_data.cbSize = sizeof APPBARDATA;
+  taskbar_data.uEdge = edge;
+  HWND taskbar = reinterpret_cast<HWND>(SHAppBarMessage(ABM_GETAUTOHIDEBAR,
+                                                        &taskbar_data));
+  return ::IsWindow(taskbar) && (monitor != NULL) &&
+      (MonitorFromWindow(taskbar, MONITOR_DEFAULTTONULL) == monitor) &&
+      (GetWindowLong(taskbar, GWL_EXSTYLE) & WS_EX_TOPMOST);
+}
+
 // Links the HWND to its NativeWidget.
 const char* const kNativeWidgetKey = "__VIEWS_NATIVE_WIDGET__";
 
@@ -280,7 +346,12 @@
       fullscreen_(false),
       force_hidden_count_(0),
       lock_updates_(false),
-      saved_window_style_(0) {
+      saved_window_style_(0),
+      ignore_window_pos_changes_(false),
+      ignore_pos_changes_factory_(this),
+      last_monitor_(NULL),
+      is_right_mouse_pressed_on_caption_(false),
+      restored_enabled_(false) {
 }
 
 NativeWidgetWin::~NativeWidgetWin() {
@@ -300,6 +371,15 @@
   return SUCCEEDED(DwmIsCompositionEnabled(&enabled)) && enabled;
 }
 
+// static
+gfx::Font NativeWidgetWin::GetWindowTitleFont() {
+  NONCLIENTMETRICS ncm;
+  base::win::GetNonClientMetrics(&ncm);
+  l10n_util::AdjustUIFont(&(ncm.lfCaptionFont));
+  base::win::ScopedHFONT caption_font(CreateFontIndirect(&(ncm.lfCaptionFont)));
+  return gfx::Font(caption_font);
+}
+
 void NativeWidgetWin::Show(int show_state) {
   ShowWindow(show_state);
   // When launched from certain programs like bash and Windows Live Messenger,
@@ -366,6 +446,9 @@
 void NativeWidgetWin::InitNativeWidget(const Widget::InitParams& params) {
   SetInitParams(params);
 
+  GetMonitorAndRects(params.bounds.ToRECT(), &last_monitor_,
+                     &last_monitor_rect_, &last_work_area_);
+
   // Create the window.
   gfx::NativeView parent = params.parent_widget ?
       params.parent_widget->GetNativeView() : params.parent;
@@ -617,6 +700,17 @@
   }
 }
 
+void NativeWidgetWin::BecomeModal() {
+  // We implement modality by crawling up the hierarchy of windows starting
+  // at the owner, disabling all of them so that they don't receive input
+  // messages.
+  HWND start = ::GetWindow(GetNativeView(), GW_OWNER);
+  while (start) {
+    ::EnableWindow(start, FALSE);
+    start = ::GetParent(start);
+  }
+}
+
 gfx::Rect NativeWidgetWin::GetWindowScreenBounds() const {
   RECT r;
   GetWindowRect(&r);
@@ -1083,7 +1177,10 @@
   // creation time.
   ClientAreaSizeChanged();
 
-  delegate_->OnNativeWidgetCreated();
+  delegate_->OnNativeWidgetCreated(gfx::Rect(create_struct->x,
+                                             create_struct->y,
+                                             create_struct->cx,
+                                             create_struct->cy));
 
   // delegate_->OnNativeWidgetCreated() creates the focus manager for top-level
   // widget. Only top-level widget should have an input method.
@@ -1097,6 +1194,7 @@
 }
 
 void NativeWidgetWin::OnDestroy() {
+  RestoreEnabledIfNecessary();
   delegate_->OnNativeWidgetDestroying();
   if (drop_target_.get()) {
     RevokeDragDrop(hwnd());
@@ -1309,6 +1407,75 @@
 LRESULT NativeWidgetWin::OnMouseRange(UINT message,
                                       WPARAM w_param,
                                       LPARAM l_param) {
+  if (message == WM_RBUTTONUP && is_right_mouse_pressed_on_caption_) {
+    is_right_mouse_pressed_on_caption_ = false;
+    ReleaseCapture();
+    // |point| is in window coordinates, but WM_NCHITTEST and TrackPopupMenu()
+    // expect screen coordinates.
+    CPoint screen_point(l_param);
+    MapWindowPoints(GetNativeView(), HWND_DESKTOP, &screen_point, 1);
+    w_param = SendMessage(GetNativeView(), WM_NCHITTEST, 0,
+                          MAKELPARAM(screen_point.x, screen_point.y));
+    if (w_param == HTCAPTION || w_param == HTSYSMENU) {
+      UINT flags = TPM_LEFTBUTTON | TPM_RIGHTBUTTON | TPM_RETURNCMD;
+      if (base::i18n::IsRTL())
+        flags |= TPM_RIGHTALIGN;
+      HMENU system_menu = GetSystemMenu(GetNativeView(), FALSE);
+      int id = TrackPopupMenu(system_menu, flags, screen_point.x,
+                              screen_point.y, 0, GetNativeView(), NULL);
+      ExecuteSystemMenuCommand(id);
+      return 0;
+    }
+  } else if (message == WM_NCLBUTTONDOWN &&
+             !GetWidget()->ShouldUseNativeFrame()) {
+    switch (w_param) {
+      case HTCLOSE:
+      case HTMINBUTTON:
+      case HTMAXBUTTON: {
+        // When the mouse is pressed down in these specific non-client areas,
+        // we need to tell the RootView to send the mouse pressed event (which
+        // sets capture, allowing subsequent WM_LBUTTONUP (note, _not_
+        // WM_NCLBUTTONUP) to fire so that the appropriate WM_SYSCOMMAND can be
+        // sent by the applicable button's ButtonListener. We _have_ to do this
+        // way rather than letting Windows just send the syscommand itself (as
+        // would happen if we never did this dance) because for some insane
+        // reason DefWindowProc for WM_NCLBUTTONDOWN also renders the pressed
+        // window control button appearance, in the Windows classic style, over
+        // our view! Ick! By handling this message we prevent Windows from
+        // doing this undesirable thing, but that means we need to roll the
+        // sys-command handling ourselves.
+        // Combine |w_param| with common key state message flags.
+        w_param |= ((GetKeyState(VK_CONTROL) & 0x80) == 0x80)? MK_CONTROL : 0;
+        w_param |= ((GetKeyState(VK_SHIFT) & 0x80) == 0x80)? MK_SHIFT : 0;
+      }
+    }
+  } else if (message == WM_NCRBUTTONDOWN &&
+      (w_param == HTCAPTION || w_param == HTSYSMENU)) {
+    is_right_mouse_pressed_on_caption_ = true;
+    // We SetMouseCapture() to ensure we only show the menu when the button
+    // down and up are both on the caption. Note: this causes the button up to
+    // be WM_RBUTTONUP instead of WM_NCRBUTTONUP.
+    SetMouseCapture();
+  }
+
+  /*
+  TODO(beng): This fixes some situations where the windows-classic appearance
+              non-client area is rendered over our custom frame, however it
+              causes mouse-releases to the non-client area to be eaten, so it
+              can't be enabled.
+  if (message == WM_NCLBUTTONDOWN) {
+    // NativeWidgetWin::OnNCLButtonDown set the message as un-handled. This
+    // normally means NativeWidgetWin::ProcessWindowMessage will pass it to
+    // DefWindowProc. Sadly, DefWindowProc for WM_NCLBUTTONDOWN does weird
+    // non-client painting, so we need to call it directly here inside a
+    // scoped update lock.
+    ScopedRedrawLock lock(this);
+    NativeWidgetWin::OnMouseRange(message, w_param, l_param);
+    DefWindowProc(GetNativeView(), WM_NCLBUTTONDOWN, w_param, l_param);
+    SetMsgHandled(TRUE);
+  }
+  */
+
   MSG msg = { hwnd(), message, w_param, l_param, 0,
               { GET_X_LPARAM(l_param), GET_Y_LPARAM(l_param) } };
   MouseEvent event(msg);
@@ -1385,9 +1552,86 @@
   return CallDefaultNCActivateHandler(inactive_rendering_disabled || active);
 }
 
-LRESULT NativeWidgetWin::OnNCCalcSize(BOOL w_param, LPARAM l_param) {
-  SetMsgHandled(FALSE);
-  return 0;
+LRESULT NativeWidgetWin::OnNCCalcSize(BOOL mode, LPARAM l_param) {
+  // We only override the default handling if we need to specify a custom
+  // non-client edge width. Note that in most cases "no insets" means no
+  // custom width, but in fullscreen mode we want a custom width of 0.
+  gfx::Insets insets = GetClientAreaInsets();
+  if (insets.empty() && !IsFullscreen()) {
+    SetMsgHandled(FALSE);
+    return 0;
+  }
+
+  RECT* client_rect = mode ?
+      &reinterpret_cast<NCCALCSIZE_PARAMS*>(l_param)->rgrc[0] :
+      reinterpret_cast<RECT*>(l_param);
+  client_rect->left += insets.left();
+  client_rect->top += insets.top();
+  client_rect->bottom -= insets.bottom();
+  client_rect->right -= insets.right();
+  if (IsMaximized()) {
+    // Find all auto-hide taskbars along the screen edges and adjust in by the
+    // thickness of the auto-hide taskbar on each such edge, so the window isn't
+    // treated as a "fullscreen app", which would cause the taskbars to
+    // disappear.
+    HMONITOR monitor = MonitorFromWindow(GetNativeView(),
+                                         MONITOR_DEFAULTTONULL);
+    if (!monitor) {
+      // We might end up here if the window was previously minimized and the
+      // user clicks on the taskbar button to restore it in the previously
+      // maximized position. In that case WM_NCCALCSIZE is sent before the
+      // window coordinates are restored to their previous values, so our
+      // (left,top) would probably be (-32000,-32000) like all minimized
+      // windows. So the above MonitorFromWindow call fails, but if we check
+      // the window rect given with WM_NCCALCSIZE (which is our previous
+      // restored window position) we will get the correct monitor handle.
+      monitor = MonitorFromRect(client_rect, MONITOR_DEFAULTTONULL);
+      if (!monitor) {
+        // This is probably an extreme case that we won't hit, but if we don't
+        // intersect any monitor, let us not adjust the client rect since our
+        // window will not be visible anyway.
+        return 0;
+      }
+    }
+    if (EdgeHasTopmostAutoHideTaskbar(ABE_LEFT, monitor))
+      client_rect->left += kAutoHideTaskbarThicknessPx;
+    if (EdgeHasTopmostAutoHideTaskbar(ABE_TOP, monitor)) {
+      if (GetWidget()->ShouldUseNativeFrame()) {
+        // Tricky bit.  Due to a bug in DwmDefWindowProc()'s handling of
+        // WM_NCHITTEST, having any nonclient area atop the window causes the
+        // caption buttons to draw onscreen but not respond to mouse
+        // hover/clicks.
+        // So for a taskbar at the screen top, we can't push the
+        // client_rect->top down; instead, we move the bottom up by one pixel,
+        // which is the smallest change we can make and still get a client area
+        // less than the screen size. This is visibly ugly, but there seems to
+        // be no better solution.
+        --client_rect->bottom;
+      } else {
+        client_rect->top += kAutoHideTaskbarThicknessPx;
+      }
+    }
+    if (EdgeHasTopmostAutoHideTaskbar(ABE_RIGHT, monitor))
+      client_rect->right -= kAutoHideTaskbarThicknessPx;
+    if (EdgeHasTopmostAutoHideTaskbar(ABE_BOTTOM, monitor))
+      client_rect->bottom -= kAutoHideTaskbarThicknessPx;
+
+    // We cannot return WVR_REDRAW when there is nonclient area, or Windows
+    // exhibits bugs where client pixels and child HWNDs are mispositioned by
+    // the width/height of the upper-left nonclient area.
+    return 0;
+  }
+
+  // If the window bounds change, we're going to relayout and repaint anyway.
+  // Returning WVR_REDRAW avoids an extra paint before that of the old client
+  // pixels in the (now wrong) location, and thus makes actions like resizing a
+  // window from the left edge look slightly less broken.
+  // We special case when left or top insets are 0, since these conditions
+  // actually require another repaint to correct the layout after glass gets
+  // turned on and off.
+  if (insets.left() == 0 || insets.top() == 0)
+    return 0;
+  return mode ? WVR_REDRAW : 0;
 }
 
 LRESULT NativeWidgetWin::OnNCHitTest(const CPoint& point) {
@@ -1421,7 +1665,85 @@
 }
 
 void NativeWidgetWin::OnNCPaint(HRGN rgn) {
-  SetMsgHandled(FALSE);
+  // We only do non-client painting if we're not using the native frame.
+  // It's required to avoid some native painting artifacts from appearing when
+  // the window is resized.
+  if (!GetWidget()->non_client_view() || GetWidget()->ShouldUseNativeFrame()) {
+    SetMsgHandled(FALSE);
+    return;
+  }
+
+  // We have an NC region and need to paint it. We expand the NC region to
+  // include the dirty region of the root view. This is done to minimize
+  // paints.
+  CRect window_rect;
+  GetWindowRect(&window_rect);
+
+  if (window_rect.Width() != GetWidget()->GetRootView()->width() ||
+      window_rect.Height() != GetWidget()->GetRootView()->height()) {
+    // If the size of the window differs from the size of the root view it
+    // means we're being asked to paint before we've gotten a WM_SIZE. This can
+    // happen when the user is interactively resizing the window. To avoid
+    // mass flickering we don't do anything here. Once we get the WM_SIZE we'll
+    // reset the region of the window which triggers another WM_NCPAINT and
+    // all is well.
+    return;
+  }
+
+  CRect dirty_region;
+  // A value of 1 indicates paint all.
+  if (!rgn || rgn == reinterpret_cast<HRGN>(1)) {
+    dirty_region = CRect(0, 0, window_rect.Width(), window_rect.Height());
+  } else {
+    RECT rgn_bounding_box;
+    GetRgnBox(rgn, &rgn_bounding_box);
+    if (!IntersectRect(&dirty_region, &rgn_bounding_box, &window_rect))
+      return;  // Dirty region doesn't intersect window bounds, bale.
+
+    // rgn_bounding_box is in screen coordinates. Map it to window coordinates.
+    OffsetRect(&dirty_region, -window_rect.left, -window_rect.top);
+  }
+
+  // In theory GetDCEx should do what we want, but I couldn't get it to work.
+  // In particular the docs mentiond DCX_CLIPCHILDREN, but as far as I can tell
+  // it doesn't work at all. So, instead we get the DC for the window then
+  // manually clip out the children.
+  HDC dc = GetWindowDC(GetNativeView());
+  ClipState clip_state;
+  clip_state.x = window_rect.left;
+  clip_state.y = window_rect.top;
+  clip_state.parent = GetNativeView();
+  clip_state.dc = dc;
+  EnumChildWindows(GetNativeView(), &ClipDCToChild,
+                   reinterpret_cast<LPARAM>(&clip_state));
+
+  gfx::Rect old_paint_region = invalid_rect();
+
+  if (!old_paint_region.IsEmpty()) {
+    // The root view has a region that needs to be painted. Include it in the
+    // region we're going to paint.
+
+    CRect old_paint_region_crect = old_paint_region.ToRECT();
+    CRect tmp = dirty_region;
+    UnionRect(&dirty_region, &tmp, &old_paint_region_crect);
+  }
+
+  GetWidget()->GetRootView()->SchedulePaintInRect(gfx::Rect(dirty_region));
+
+  // gfx::CanvasSkiaPaint's destructor does the actual painting. As such, wrap
+  // the following in a block to force paint to occur so that we can release
+  // the dc.
+  {
+    gfx::CanvasSkiaPaint canvas(dc, true, dirty_region.left,
+                                dirty_region.top, dirty_region.Width(),
+                                dirty_region.Height());
+    delegate_->OnNativeWidgetPaint(&canvas);
+  }
+
+  ReleaseDC(GetNativeView(), dc);
+  // When using a custom frame, we want to avoid calling DefWindowProc() since
+  // that may render artifacts.
+  SetMsgHandled(!GetWidget()->ShouldUseNativeFrame());
 }
 
 LRESULT NativeWidgetWin::OnNCUAHDrawCaption(UINT msg,
@@ -1600,6 +1922,67 @@
 }
 
 void NativeWidgetWin::OnWindowPosChanging(WINDOWPOS* window_pos) {
+  if (ignore_window_pos_changes_) {
+    // If somebody's trying to toggle our visibility, change the nonclient area,
+    // change our Z-order, or activate us, we should probably let it go through.
+    if (!(window_pos->flags & ((IsVisible() ? SWP_HIDEWINDOW : SWP_SHOWWINDOW) |
+        SWP_FRAMECHANGED)) &&
+        (window_pos->flags & (SWP_NOZORDER | SWP_NOACTIVATE))) {
+      // Just sizing/moving the window; ignore.
+      window_pos->flags |= SWP_NOSIZE | SWP_NOMOVE | SWP_NOREDRAW;
+      window_pos->flags &= ~(SWP_SHOWWINDOW | SWP_HIDEWINDOW);
+    }
+  } else if (!GetParent()) {
+    CRect window_rect;
+    HMONITOR monitor;
+    gfx::Rect monitor_rect, work_area;
+    if (GetWindowRect(&window_rect) &&
+        GetMonitorAndRects(window_rect, &monitor, &monitor_rect, &work_area)) {
+      if (monitor && (monitor == last_monitor_) &&
+          (IsFullscreen() || ((monitor_rect == last_monitor_rect_) &&
+              (work_area != last_work_area_)))) {
+        // A rect for the monitor we're on changed.  Normally Windows notifies
+        // us about this (and thus we're reaching here due to the SetWindowPos()
+        // call in OnSettingChange() above), but with some software (e.g.
+        // nVidia's nView desktop manager) the work area can change asynchronous
+        // to any notification, and we're just sent a SetWindowPos() call with a
+        // new (frequently incorrect) position/size.  In either case, the best
+        // response is to throw away the existing position/size information in
+        // |window_pos| and recalculate it based on the new work rect.
+        gfx::Rect new_window_rect;
+        if (IsFullscreen()) {
+          new_window_rect = monitor_rect;
+        } else if (IsZoomed()) {
+          new_window_rect = work_area;
+          int border_thickness = GetSystemMetrics(SM_CXSIZEFRAME);
+          new_window_rect.Inset(-border_thickness, -border_thickness);
+        } else {
+          new_window_rect = gfx::Rect(window_rect).AdjustToFit(work_area);
+        }
+        window_pos->x = new_window_rect.x();
+        window_pos->y = new_window_rect.y();
+        window_pos->cx = new_window_rect.width();
+        window_pos->cy = new_window_rect.height();
+        // WARNING!  Don't set SWP_FRAMECHANGED here, it breaks moving the child
+        // HWNDs for some reason.
+        window_pos->flags &= ~(SWP_NOSIZE | SWP_NOMOVE | SWP_NOREDRAW);
+        window_pos->flags |= SWP_NOCOPYBITS;
+
+        // Now ignore all immediately-following SetWindowPos() changes.  Windows
+        // likes to (incorrectly) recalculate what our position/size should be
+        // and send us further updates.
+        ignore_window_pos_changes_ = true;
+        DCHECK(ignore_pos_changes_factory_.empty());
+        MessageLoop::current()->PostTask(FROM_HERE,
+            ignore_pos_changes_factory_.NewRunnableMethod(
+            &NativeWidgetWin::StopIgnoringPosChanges));
+      }
+      last_monitor_ = monitor;
+      last_monitor_rect_ = monitor_rect;
+      last_work_area_ = work_area;
+    }
+  }
+
   if (force_hidden_count_) {
     // Prevent the window from being made visible if we've been asked to do so.
     // See comment in header as to why we might want this.
@@ -1631,7 +2014,7 @@
 gfx::Insets NativeWidgetWin::GetClientAreaInsets() const {
   // Returning an empty Insets object causes the default handling in
   // NativeWidgetWin::OnNCCalcSize() to be invoked.
-  if (GetWidget()->ShouldUseNativeFrame())
+  if (!GetWidget()->non_client_view() || GetWidget()->ShouldUseNativeFrame())
     return gfx::Insets();
 
   if (IsMaximized()) {
@@ -1780,7 +2163,26 @@
 
   // Set type-dependent style attributes.
   switch (params.type) {
-    case Widget::InitParams::TYPE_WINDOW:
+    case Widget::InitParams::TYPE_WINDOW: {
+      style |= WS_SYSMENU | WS_CAPTION;
+      bool can_resize = GetWidget()->widget_delegate()->CanResize();
+      bool can_maximize = GetWidget()->widget_delegate()->CanMaximize();
+      if (can_maximize) {
+        style |= WS_OVERLAPPEDWINDOW;
+      } else if (can_resize) {
+        style |= WS_OVERLAPPED | WS_THICKFRAME;
+      }
+      if (delegate_->IsDialogBox()) {
+        style |= DS_MODALFRAME;
+        // NOTE: Turning this off means we lose the close button, which is bad.
+        // Turning it on though means the user can maximize or size the window
+        // from the system menu, which is worse. We may need to provide our own
+        // menu to get the close button to appear properly.
+        // style &= ~WS_SYSMENU;
+      }
+      ex_style |= delegate_->IsDialogBox() ? WS_EX_DLGMODALFRAME : 0;
+      break;
+    }
     case Widget::InitParams::TYPE_CONTROL:
       break;
     case Widget::InitParams::TYPE_POPUP:
@@ -1921,6 +2323,20 @@
 #endif
 }
 
+void NativeWidgetWin::RestoreEnabledIfNecessary() {
+  if (delegate_->IsModal() && !restored_enabled_) {
+    restored_enabled_ = true;
+    // If we were run modally, we need to undo the disabled-ness we inflicted on
+    // the owner's parent hierarchy.
+    HWND start = ::GetWindow(GetNativeView(), GW_OWNER);
+    while (start) {
+      ::EnableWindow(start, TRUE);
+      start = ::GetParent(start);
+    }
+  }
+}
+
+
 void NativeWidgetWin::DispatchKeyEventPostIME(const KeyEvent& key) {
   SetMsgHandled(delegate_->OnKeyEvent(key));
 }