[MD] Implement incognito colors as a NativeTheme (for Aura).

ui/views/widget/widget.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 "ui/views/widget/widget.h"
 
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 93 matching lines @@
   Widget* widget_;
 
   DISALLOW_COPY_AND_ASSIGN(DefaultWidgetDelegate);
 };
 
 ////////////////////////////////////////////////////////////////////////////////
 // Widget, InitParams:
 
 Widget::InitParams::InitParams()
     : type(TYPE_WINDOW),
-      delegate(NULL),
+      delegate(nullptr),
       child(false),
       opacity(INFER_OPACITY),
       accept_events(true),
       activatable(ACTIVATABLE_DEFAULT),
       keep_on_top(false),
       visible_on_all_workspaces(false),
       ownership(NATIVE_WIDGET_OWNS_WIDGET),
       mirror_origin_in_rtl(false),
       shadow_type(SHADOW_TYPE_DEFAULT),
       remove_standard_frame(false),
       use_system_default_icon(false),
       show_state(ui::SHOW_STATE_DEFAULT),
-      parent(NULL),
-      native_widget(NULL),
-      desktop_window_tree_host(NULL),
+      parent(nullptr),
+      native_widget(nullptr),
+      native_theme(nullptr),
+      desktop_window_tree_host(nullptr),
       layer_type(ui::LAYER_TEXTURED),
-      context(NULL),
+      context(nullptr),
       force_show_in_taskbar(false),
       force_software_compositing(false) {
 }
 
 Widget::InitParams::InitParams(Type type)
     : type(type),
-      delegate(NULL),
+      delegate(nullptr),
       child(false),
       opacity(INFER_OPACITY),
       accept_events(true),
       activatable(ACTIVATABLE_DEFAULT),
       keep_on_top(type == TYPE_MENU || type == TYPE_DRAG),
       visible_on_all_workspaces(false),
       ownership(NATIVE_WIDGET_OWNS_WIDGET),
       mirror_origin_in_rtl(false),
       shadow_type(SHADOW_TYPE_DEFAULT),
       remove_standard_frame(false),
       use_system_default_icon(false),
       show_state(ui::SHOW_STATE_DEFAULT),
-      parent(NULL),
-      native_widget(NULL),
-      desktop_window_tree_host(NULL),
+      parent(nullptr),
+      native_widget(nullptr),
+      native_theme(nullptr),
+      desktop_window_tree_host(nullptr),
       layer_type(ui::LAYER_TEXTURED),
-      context(NULL),
+      context(nullptr),
       force_show_in_taskbar(false),
       force_software_compositing(false) {
 }
 
 Widget::InitParams::~InitParams() {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // Widget, public:
 
 Widget::Widget()
-    : native_widget_(NULL),
-      widget_delegate_(NULL),
-      non_client_view_(NULL),
-      dragged_view_(NULL),
+    : native_widget_(nullptr),
+      native_theme_(nullptr),
+      widget_delegate_(nullptr),
+      non_client_view_(nullptr),
+      dragged_view_(nullptr),
       ownership_(InitParams::NATIVE_WIDGET_OWNS_WIDGET),
       is_secondary_widget_(true),
       frame_type_(FRAME_TYPE_DEFAULT),
       disable_inactive_rendering_(false),
       widget_closed_(false),
       saved_show_state_(ui::SHOW_STATE_DEFAULT),
       focus_on_creation_(true),
       is_top_level_(false),
       native_widget_initialized_(false),
       native_widget_destroyed_(false),
@@ skipping 177 matching lines @@
 
   ownership_ = params.ownership;
   native_widget_ = CreateNativeWidget(params, this)->AsNativeWidgetPrivate();
   root_view_.reset(CreateRootView());
   default_theme_provider_.reset(new ui::DefaultThemeProvider);
   if (params.type == InitParams::TYPE_MENU) {
     is_mouse_button_pressed_ =
         internal::NativeWidgetPrivate::IsMouseButtonDown();
   }
   native_widget_->InitNativeWidget(params);
+  native_theme_ = params.native_theme;
   if (RequiresNonClientView(params.type)) {
     non_client_view_ = new NonClientView;
     non_client_view_->SetFrameView(CreateNonClientFrameView());
     // Create the ClientView, add it to the NonClientView and add the
     // NonClientView to the RootView. This will cause everything to be parented.
     non_client_view_->set_client_view(widget_delegate_->CreateClientView(this));
     non_client_view_->SetOverlayView(widget_delegate_->CreateOverlayView());
     SetContentsView(non_client_view_);
     // Initialize the window's icon and title before setting the window's
     // initial bounds; the frame view's preferred height may depend on the
@@ skipping 381 matching lines @@
       return provider;
 
     provider = root_widget->default_theme_provider_.get();
     if (provider)
       return provider;
   }
   return default_theme_provider_.get();
 }
 
 const ui::NativeTheme* Widget::GetNativeTheme() const {
-  return native_widget_->GetNativeTheme();
+  return native_theme_? native_theme_ : native_widget_->GetNativeTheme();
 }
 
 FocusManager* Widget::GetFocusManager() {
   Widget* toplevel_widget = GetTopLevelWidget();
   return toplevel_widget ? toplevel_widget->focus_manager_.get() : NULL;
 }
 
 const FocusManager* Widget::GetFocusManager() const {
   const Widget* toplevel_widget = GetTopLevelWidget();
   return toplevel_widget ? toplevel_widget->focus_manager_.get() : NULL;
@@ skipping 718 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // internal::NativeWidgetPrivate, NativeWidget implementation:
 
 internal::NativeWidgetPrivate* NativeWidgetPrivate::AsNativeWidgetPrivate() {
   return this;
 }
 
 }  // namespace internal
 }  // namespace views