Add bluetooth device type icons on MD system tray.

ash/common/system/chromeos/bluetooth/tray_bluetooth.cc

Index: ash/common/system/chromeos/bluetooth/tray_bluetooth.cc
diff --git a/ash/common/system/chromeos/bluetooth/tray_bluetooth.cc b/ash/common/system/chromeos/bluetooth/tray_bluetooth.cc
index c3cd91d650e401804fb35d316d98df250546cc4d..6e6042356fb4eaec6c18121d2980a2b6e49c8343 100644
--- a/ash/common/system/chromeos/bluetooth/tray_bluetooth.cc
+++ b/ash/common/system/chromeos/bluetooth/tray_bluetooth.cc
@@ -23,8 +23,10 @@
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/color_palette.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/paint_vector_icon.h"
+#include "ui/gfx/vector_icons_public.h"
 #include "ui/views/controls/button/toggle_button.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
@@ -230,10 +232,12 @@ class BluetoothDetailedView : public TrayDetailsView {
   }
 
   void UpdateHeaderEntry() {
-    if (toggle_bluetooth_) {
-      toggle_bluetooth_->SetToggled(
-          !WmShell::Get()->system_tray_delegate()->GetBluetoothEnabled());
-    }
+    bool is_bluetooth_enabled =
+        WmShell::Get()->system_tray_delegate()->GetBluetoothEnabled();
+    if (toggle_)
+      toggle_->SetIsOn(is_bluetooth_enabled, false);
+    else if (toggle_bluetooth_)
+      toggle_bluetooth_->SetToggled(!is_bluetooth_enabled);
   }
 
   void UpdateDeviceScrollList() {
@@ -280,11 +284,18 @@ class BluetoothDetailedView : public TrayDetailsView {
                                          bool enabled) {
     for (size_t i = 0; i < list.size(); ++i) {
       HoverHighlightView* container =
-          AddScrollListItem(list[i].display_name, highlight, checked, enabled);
+          MaterialDesignController::IsSystemTrayMenuMaterial()
+              ? AddScrollListItemWithIcon(list[i].display_name, highlight,
+                                          checked, enabled, list[i].icon_image)
+              : AddScrollListItem(list[i].display_name, highlight, checked,
+                                  enabled);
       device_map_[container] = list[i].address;
     }
   }
 
+  // TODO(fukino): Remove this code when material design is enabled by default,
+  // since AddScrollListItem should be used only in the old design.
+  // See crbug.com/614453".
   HoverHighlightView* AddScrollListItem(const base::string16& text,
                                         bool highlight,
                                         bool checked,
@@ -297,6 +308,25 @@ class BluetoothDetailedView : public TrayDetailsView {
     return container;
   }
 
+  HoverHighlightView* AddScrollListItemWithIcon(const base::string16& text,
+                                                bool highlight,
+                                                bool checked,
+                                                bool enabled,
+                                                const gfx::ImageSkia& image) {
+    HoverHighlightView* container = new HoverHighlightView(this);
+    const int padding = (kMenuButtonSize - image.width()) / 2;
+    container->AddIconAndLabelCustomSize(
+        image, text, highlight,
+        image.width() + kMenuSeparatorVerticalPadding * 2, padding, padding);
+    gfx::ImageSkia check_mark =
+        CreateVectorIcon(gfx::VectorIconId::CHECK_CIRCLE, gfx::kGoogleGreen700);
+    container->AddRightIcon(check_mark, check_mark.width());
+    container->SetRightIconVisible(checked);
+    container->text_label()->SetEnabled(enabled);
+    scroll_content()->AddChildView(container);
+    return container;
+  }
+
   // Add settings entries.
   void AppendSettingsEntries() {
     if (!WmShell::Get()->system_tray_delegate()->ShouldShowSettings())
@@ -389,9 +419,10 @@ class BluetoothDetailedView : public TrayDetailsView {
   void HandleButtonPressed(views::Button* sender,
                            const ui::Event& event) override {
     if (MaterialDesignController::IsSystemTrayMenuMaterial()) {
-      // TODO(fukino): Make the toggle button functional.
       if (sender == toggle_)
-        toggle_->SetIsOn(toggle_->is_on(), true);
+        WmShell::Get()->system_tray_delegate()->ToggleBluetooth();
+      else
+        NOTREACHED();
       return;
     }