exo: Add "back" button to shell surface decorations.

components/exo/shell_surface.cc

 // 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.
 
 #include "components/exo/shell_surface.h"
 
+#include "ash/frame/caption_buttons/frame_caption_button.h"
+#include "ash/frame/custom_frame_view_ash.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "components/exo/surface.h"
+#include "grit/ash_resources.h"
 #include "ui/aura/window.h"
 #include "ui/base/hit_test.h"
 #include "ui/views/widget/widget.h"
 
 namespace exo {
 namespace {
 
-class CustomFrameView : public views::NonClientFrameView {
+class CustomFrameView : public ash::CustomFrameViewAsh,
+                        public views::ButtonListener {
  public:
-  explicit CustomFrameView(views::Widget* widget) : widget_(widget) {}
+  explicit CustomFrameView(views::Widget* widget)
+      : ash::CustomFrameViewAsh(widget) {
+    ash::FrameCaptionButton* back_button =
+        new ash::FrameCaptionButton(this, ash::CAPTION_BUTTON_ICON_BACK);
+    back_button->SetImages(
+        ash::CAPTION_BUTTON_ICON_BACK, ash::FrameCaptionButton::ANIMATE_NO,
+        IDR_AURA_WINDOW_CONTROL_ICON_BACK, IDR_AURA_WINDOW_CONTROL_BACKGROUND_H,
+        IDR_AURA_WINDOW_CONTROL_BACKGROUND_P);
+    SetLeftCaptionButton(back_button);
+  }
   ~CustomFrameView() override {}
 
-  // Overridden from views::NonClientFrameView:
-  gfx::Rect GetBoundsForClientView() const override { return bounds(); }
-  gfx::Rect GetWindowBoundsForClientBounds(
-      const gfx::Rect& client_bounds) const override {
-    return client_bounds;
+  // Overridden from views::ButtonListener:
+  void ButtonPressed(views::Button* sender, const ui::Event& event) override {
+    NOTIMPLEMENTED();
   }
-  int NonClientHitTest(const gfx::Point& point) override {
-    return widget_->client_view()->NonClientHitTest(point);
-  }
-  void GetWindowMask(const gfx::Size& size, gfx::Path* window_mask) override {}
-  void ResetWindowControls() override {}
-  void UpdateWindowIcon() override {}
-  void UpdateWindowTitle() override {}
-  void SizeConstraintsChanged() override {}
 
  private:
-  views::Widget* const widget_;
-
   DISALLOW_COPY_AND_ASSIGN(CustomFrameView);
 };
 
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // ShellSurface, public:
 
 ShellSurface::ShellSurface(Surface* surface)
     : surface_(surface), show_state_(ui::SHOW_STATE_END) {
@@ skipping 119 matching lines @@
 views::View* ShellSurface::GetContentsView() {
   return surface_;
 }
 
 views::NonClientFrameView* ShellSurface::CreateNonClientFrameView(
     views::Widget* widget) {
   return new CustomFrameView(widget);
 }
 
 }  // namespace exo