chromeos: Add SurfaceServiceProvider.

ash/surfaces/test_surface_overlay_view.h

+// Copyright 2015 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.
+
+#ifndef ASH_TEST_SURFACE_OVERLAY_SURFACE_OVERLAY_VIEW_H_
+#define ASH_TEST_SURFACE_OVERLAY_SURFACE_OVERLAY_VIEW_H_
+
+#include "ash/surfaces/surface_controller.h"
+#include "ash/wm/overlay_event_filter.h"
+#include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+#include "ui/views/widget/widget_delegate.h"
+
+namespace cc {
+class ContentProvider;
+}
+
+namespace ui {
+class Layer;
+}
+
+namespace ash {
+
+class TestSurfaceOverlayView : public views::WidgetDelegateView,

[denniskempin (chromium), 2015/10/09 21:16:24]

I know this code is WIP, just wanted to leave this observation here: 

Using views::WidgetDelegateView might be a problem. The view class implements
OnTouchEvent as:
   NOTREACHED() << "Views should not receive touch events.";

Of course we could just override that, but I suppose there is a reason why it is
implemented this way. 

+                               public OverlayEventFilter::Delegate,
+                               public SurfaceController::Observer {
+ public:
+  TestSurfaceOverlayView();
+  ~TestSurfaceOverlayView() override;
+
+  // Overridden from ui::EventHandler:
+  void OnKeyEvent(ui::KeyEvent* event) override;
+  void OnMouseEvent(ui::MouseEvent* event) override;
+  void OnScrollEvent(ui::ScrollEvent* event) override;
+  void OnGestureEvent(ui::GestureEvent* event) override;
+
+  // Overridden from views::View:
+  void OnPaint(gfx::Canvas* canvas) override;
+
+  // Overridden from views::WidgetDelegate:
+  void WindowClosing() override;
+
+  // Overridden from ash::OverlayEventFilter::Delegate:
+  void Cancel() override;
+  bool IsCancelingKeyEvent(ui::KeyEvent* event) override;
+  aura::Window* GetWindow() override;
+
+  // Overridden from SurfaceOverlayController::Observer:
+  void OnTestSurfaceGpuMemoryBufferChanged() override;
+
+  // Shows the test surface overlay.
+  static void Show();
+
+ private:
+  void TextureReleased(scoped_refptr<cc::ContextProvider> context_provider,
+                       unsigned image_id,
+                       unsigned texture_id,
+                       uint32 sync_point,
+                       bool is_lost);
+
+  scoped_ptr<ui::Layer> test_surface_layer_;
+
+  base::WeakPtrFactory<TestSurfaceOverlayView> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestSurfaceOverlayView);
+};
+
+}  // namespace ash
+
+#endif  // ASH_SURFACES_TEST_SURFACE_OVERLAY_VIEW_H_