Create chrome://device-emulator and add the ability to get a battery percentage and send an updated…

chrome/browser/ui/webui/chrome_web_ui_controller_factory.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 "chrome/browser/ui/webui/chrome_web_ui_controller_factory.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 101 matching lines @@
 #include "components/proximity_auth/webui/proximity_auth_ui.h"
 #include "components/proximity_auth/webui/url_constants.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/ui/webui/chromeos/bluetooth_pairing_ui.h"
 #include "chrome/browser/ui/webui/chromeos/certificate_manager_dialog_ui.h"
 #include "chrome/browser/ui/webui/chromeos/choose_mobile_network_ui.h"
 #include "chrome/browser/ui/webui/chromeos/cryptohome_ui.h"
 #include "chrome/browser/ui/webui/chromeos/drive_internals_ui.h"
+#include "chrome/browser/ui/webui/chromeos/emulator/device_emulator_ui.h"
 #include "chrome/browser/ui/webui/chromeos/first_run/first_run_ui.h"
 #include "chrome/browser/ui/webui/chromeos/imageburner/imageburner_ui.h"
 #include "chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.h"
 #include "chrome/browser/ui/webui/chromeos/login/oobe_ui.h"
 #include "chrome/browser/ui/webui/chromeos/mobile_setup_ui.h"
 #include "chrome/browser/ui/webui/chromeos/network_ui.h"
 #include "chrome/browser/ui/webui/chromeos/nfc_debug_ui.h"
 #include "chrome/browser/ui/webui/chromeos/power_ui.h"
 #include "chrome/browser/ui/webui/chromeos/provided_file_systems_ui.h"
 #include "chrome/browser/ui/webui/chromeos/proxy_settings_ui.h"
@@ skipping 297 matching lines @@
     return &NewWebUI<SetAsDefaultBrowserUI>;
 #endif
 #if defined(OS_CHROMEOS)
   if (url.host() == chrome::kChromeUIBluetoothPairingHost)
     return &NewWebUI<chromeos::BluetoothPairingUI>;
   if (url.host() == chrome::kChromeUICertificateManagerHost)
     return &NewWebUI<chromeos::CertificateManagerDialogUI>;
   if (url.host() == chrome::kChromeUIChooseMobileNetworkHost)
     return &NewWebUI<chromeos::ChooseMobileNetworkUI>;
   if (url.host() == chrome::kChromeUICryptohomeHost)
     return &NewWebUI<chromeos::CryptohomeUI>;

[oshima, 2015/06/24 22:33:55]

Can you enable this only when running on Linux Desktop? You can use 

https://code.google.com/p/chromium/codesearch#chromium/src/base/sys_info.h&l=118

[rfrappier, 2015/06/24 23:22:27]

So I basically just need to check 

if (!IsRunningOnChromeOS)?

+  if (url.host() == chrome::kChromeUIDeviceEmulatorHost)
+    return &NewWebUI<chromeos::DeviceEmulatorUI>;
   if (url.host() == chrome::kChromeUIDriveInternalsHost)
     return &NewWebUI<chromeos::DriveInternalsUI>;
   if (url.host() == chrome::kChromeUIImageBurnerHost)
     return &NewWebUI<ImageBurnUI>;
   if (url.host() == chrome::kChromeUIFirstRunHost)
     return &NewWebUI<chromeos::FirstRunUI>;
   if (url.host() == chrome::kChromeUIKeyboardOverlayHost)
     return &NewWebUI<KeyboardOverlayUI>;
   if (url.host() == chrome::kChromeUIMobileSetupHost)
     return &NewWebUI<MobileSetupUI>;
@@ skipping 307 matching lines @@
 #endif
 
   // Android doesn't use the plugins pages.
   if (page_url.host() == chrome::kChromeUIPluginsHost)
     return PluginsUI::GetFaviconResourceBytes(scale_factor);
 
 #endif
 
   return NULL;
 }