[ash-md] Hides frame headers in overview mode not using a mask

ash/wm/panels/panel_frame_view.cc

 // Copyright (c) 2012 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 "ash/wm/panels/panel_frame_view.h"
 
+#include "ash/common/material_design/material_design_controller.h"
+#include "ash/common/wm_shell.h"
 #include "ash/frame/caption_buttons/frame_caption_button_container_view.h"
 #include "ash/frame/default_header_painter.h"
 #include "ash/frame/frame_border_hit_test_controller.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window.h"
 #include "ui/base/hit_test.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
 
 namespace ash {
 
 // static
 const char PanelFrameView::kViewClassName[] = "PanelFrameView";
 
 PanelFrameView::PanelFrameView(views::Widget* frame, FrameType frame_type)
     : frame_(frame),
       caption_button_container_(NULL),
       window_icon_(NULL),
       frame_border_hit_test_controller_(
           new FrameBorderHitTestController(frame_)) {
   DCHECK(!frame_->widget_delegate()->CanMaximize());
   if (frame_type != FRAME_NONE)
     InitHeaderPainter();
+  ash::WmShell::Get()->AddShellObserver(this);
 }
 
-PanelFrameView::~PanelFrameView() {}
+PanelFrameView::~PanelFrameView() {
+  ash::WmShell::Get()->RemoveShellObserver(this);
+}
 
 void PanelFrameView::SetFrameColors(SkColor active_frame_color,
                                     SkColor inactive_frame_color) {
   header_painter_->SetFrameColors(active_frame_color, inactive_frame_color);
 }
 
 const char* PanelFrameView::GetClassName() const {
   return kViewClassName;
 }
 
@@ skipping 85 matching lines @@
   return client_bounds;
 }
 
 gfx::Rect PanelFrameView::GetWindowBoundsForClientBounds(
     const gfx::Rect& client_bounds) const {
   gfx::Rect window_bounds = client_bounds;
   window_bounds.Inset(0, -NonClientTopBorderHeight(), 0, 0);
   return window_bounds;
 }
 
+///////////////////////////////////////////////////////////////////////////////
+// ShellObserver:
+
+void PanelFrameView::OnOverviewModeStarting() {
+  if (ash::MaterialDesignController::IsOverviewMaterial())
+    SetVisible(false);
+}
+
+void PanelFrameView::OnOverviewModeEnded() {
+  if (ash::MaterialDesignController::IsOverviewMaterial())
+    SetVisible(true);
+}
+
 }  // namespace ash