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 ea377c4122cdda6592886f85e64e8513a85b217e..6c5655db60e2010f1e146452003a8b2b09a8d9c4 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1439,6 +1439,12 @@ 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 kEnableChromebookFunctionKey[] =
+    "enable-chromebook-function-key";
+
 // Enables the redirection of viewable document requests to the Google Document
 // Viewer.
 const char kEnableGView[]                   = "enable-gview";