Add power-user keyboard mode for ChromeOS with Search key acting as a typical Fn key.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 423bcd80f9347ecb632cf9e77a066e96186846da..4ea81c14db9e86991a00814fa849fde69ad8e33e 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1436,6 +1436,12 @@ const char kEnableTouchpadThreeFingerSwipe[]
 // Skips OAuth part of ChromeOS login process.
 const char kSkipOAuthLogin[]                = "skip-oauth-login";
 
+// If true, show advanced keyboard options to overload the search key as a way
+// to access keys such as Home and End, similar to the "Function key" found
+// commonly on laptop keyboards.
+const char kEnableChromeOSFunctionKey[] =
+    "enable-chromeos-function-key";
+
 // Enables the redirection of viewable document requests to the Google Document
 // Viewer.
 const char kEnableGView[]                   = "enable-gview";