Implement the persistent metro mode setting (win8)

chrome/common/chrome_constants.cc

Index: chrome/common/chrome_constants.cc
===================================================================
--- chrome/common/chrome_constants.cc	(revision 156626)
+++ chrome/common/chrome_constants.cc	(working copy)
@@ -17,8 +17,18 @@
 #else
 #error Unknown branding
 #endif
-#endif  // OS_MACOSX
+#endif  // defined(OS_MACOSX)
 
+#if defined(OS_WIN)
+#if defined(GOOGLE_CHROME_BUILD)
+#define PRODUCT_STRING_PATH L"Google\\Chrome"
+#elif defined(CHROMIUM_BUILD)
+#define PRODUCT_STRING_PATH L"Chromium"
+#else
+#error Unknown branding
+#endif
+#endif  // defined(OS_WIN)
+
 namespace chrome {
 
 const char kChromeVersionEnvVar[] = "CHROME_VERSION";
@@ -205,11 +215,15 @@
 #if defined(OS_WIN)
 // This is used by the PreRead experiment.
 const char kPreReadEnvironmentVariable[] = "CHROME_PRE_READ_EXPERIMENT";
+// This is used by chrome in Windows 8 metro mode.
 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";
+const wchar_t kMetroRegistryPath[] =
+    L"Software\\" PRODUCT_STRING_PATH L"\\Metro";
+const wchar_t kLaunchModeValue[] = L"launch_mode";
 #endif
 
 }  // namespace chrome