Add ShellIntegration::ActivateMetroChrome, which launches Chrome in metro-mode on Windows 8.

chrome/common/chrome_constants.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/common/chrome_constants.h"
 
 #include "base/file_path.h"
 
 #define FPL FILE_PATH_LITERAL
 
@@ skipping 91 matching lines @@
 #endif  // OS_MACOSX
 
 const wchar_t kNaClAppName[] = L"nacl64";
 #if defined(GOOGLE_CHROME_BUILD)
 const wchar_t kBrowserAppName[] = L"Chrome";
 #else
 const wchar_t kBrowserAppName[] = L"Chromium";
 #endif
 
 #if defined(OS_WIN)
+const FilePath::CharType kMetroDriverDll[] = FPL("metro_driver.dll");
 const wchar_t kStatusTrayWindowClass[] = L"Chrome_StatusTrayWindow";
 #endif  // defined(OS_WIN)
 
 const wchar_t kMessageWindowClass[] = L"Chrome_MessageWindow";
 const wchar_t kCrashReportLog[] = L"Reported Crashes.txt";
 const wchar_t kTestingInterfaceDLL[] = L"testing_interface.dll";
 const char    kInitialProfile[] = "Default";
 const char    kMultiProfileDirPrefix[] = "Profile ";
 const wchar_t kBrowserResourcesDll[] = L"chrome.dll";
 const FilePath::CharType kExtensionFileExtension[] = FPL(".crx");
@@ skipping 84 matching lines @@
 const wchar_t kMetroChromeUserDataSubDir[] = L"Metro";
 const wchar_t kMetroNavigationAndSearchMessage[] =
     L"CHROME_METRO_NAV_SEARCH_REQUEST";
 const wchar_t kMetroGetCurrentTabInfoMessage[] =
     L"CHROME_METRO_GET_CURRENT_TAB_INFO";
 #endif
 
 }  // namespace chrome
 
 #undef FPL