mus: Introduce high-contrast mode in mus.

ash/sysui/shell_delegate_mus.cc

 // Copyright 2016 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/sysui/shell_delegate_mus.h"
 
 #include "ash/common/default_accessibility_delegate.h"
 #include "ash/common/media_delegate.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/system/tray/default_system_tray_delegate.h"
 #include "ash/gpu_support_stub.h"
 #include "ash/sysui/app_list_presenter_mus.h"
 #include "ash/sysui/context_menu_mus.h"
 #include "ash/sysui/pointer_watcher_delegate_mus.h"
 #include "ash/sysui/shelf_delegate_mus.h"
 #include "ash/sysui/user_wallpaper_delegate_mus.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string16.h"
 #include "components/user_manager/user_info_impl.h"
+#include "services/shell/public/cpp/connector.h"
+#include "services/ui/public/interfaces/accessibility_manager.mojom.h"
 #include "ui/app_list/presenter/app_list_presenter.h"
 #include "ui/gfx/image/image.h"
+#include "ui/views/mus/window_manager_connection.h"
 
 namespace ash {
 namespace sysui {
 
 namespace {
 
+class AccessibilityDelegateMus : public DefaultAccessibilityDelegate {

[sky, 2016/07/08 16:45:00]

To further my previous nit see how accessibility is spelled out in its entirety
here and not a11y.

+ public:
+  AccessibilityDelegateMus() {}
+  ~AccessibilityDelegateMus() override {}
+
+ private:
+  ui::mojom::AccessibilityManager* a11y_manager() {
+    if (!a11y_manager_ptr_.is_bound()) {
+      views::WindowManagerConnection::Get()->connector()->ConnectToInterface(
+          "mojo:ui", &a11y_manager_ptr_);
+    }
+    return a11y_manager_ptr_.get();
+  }
+
+  // DefaultAccessibilityDelegate:
+  void ToggleHighContrast() override {
+    DefaultAccessibilityDelegate::ToggleHighContrast();
+    a11y_manager()->SetHighContrastMode(IsHighContrastEnabled());
+  }
+
+  ui::mojom::AccessibilityManagerPtr a11y_manager_ptr_;
+
+  DISALLOW_COPY_AND_ASSIGN(AccessibilityDelegateMus);
+};
+
 class SessionStateDelegateStub : public SessionStateDelegate {
  public:
   SessionStateDelegateStub()
       : screen_locked_(false), user_info_(new user_manager::UserInfoImpl()) {}
 
   ~SessionStateDelegateStub() override {}
 
   // SessionStateDelegate:
   int GetMaximumNumberOfLoggedInUsers() const override { return 3; }
   int NumberOfLoggedInUsers() const override {
@@ skipping 150 matching lines @@
 UserWallpaperDelegate* ShellDelegateMus::CreateUserWallpaperDelegate() {
   return new UserWallpaperDelegateMus();
 }
 
 SessionStateDelegate* ShellDelegateMus::CreateSessionStateDelegate() {
   NOTIMPLEMENTED() << " Using a stub SessionStateDeleagte implementation";
   return new SessionStateDelegateStub;
 }
 
 AccessibilityDelegate* ShellDelegateMus::CreateAccessibilityDelegate() {
-  NOTIMPLEMENTED() << " Using the default AccessibilityDelegate implementation";
-  return new DefaultAccessibilityDelegate;
+  return new AccessibilityDelegateMus;
 }
 
 NewWindowDelegate* ShellDelegateMus::CreateNewWindowDelegate() {
   NOTIMPLEMENTED();
   return nullptr;
 }
 
 MediaDelegate* ShellDelegateMus::CreateMediaDelegate() {
   NOTIMPLEMENTED() << " Using a stub MediaDelegate implementation";
   return new MediaDelegateStub;
@@ skipping 19 matching lines @@
   return base::string16();
 }
 
 gfx::Image ShellDelegateMus::GetDeprecatedAcceleratorImage() const {
   NOTIMPLEMENTED();
   return gfx::Image();
 }
 
 }  // namespace sysui
 }  // namespace ash