Remove Aero Peek Tabs code.

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 1f3359a1f60b9c3f42dd3085a75d53d8787b059a..7ce73855bb1baa51b5d04b8681f32ab189164482 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -444,9 +444,6 @@ const char kDumpHistogramsOnExit[]          = "dump-histograms-on-exit";
 // Enables the Action Box toolbar UI.
 const char kEnableActionBox[]               = "enable-action-box";
 
-// Enables AeroPeek for each tab. (This switch only works on Windows 7).
-const char kEnableAeroPeekTabs[]            = "enable-aero-peek-tabs";
-
 // Enables the experimental asynchronous DNS client.
 const char kEnableAsyncDns[]                = "enable-async-dns";