Experimental AutocompleteProvider for zerosuggest.

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 cb126f1dd7344b01aa26023ac41540ebabec213f..1d558f63f1bcfffbd6d8c06348aeb0cbbc4e483c 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1343,6 +1343,10 @@ const char kWindowSize[]                    = "window-size";
 // use Chromium's network stack to fetch, and V8 to evaluate.
 const char kWinHttpProxyResolver[]          = "winhttp-proxy-resolver";
 
+// If nonempty, fetch experimental zerosuggest suggestions by appending to this
+// prefix of a URL.
+const char kZerosuggestURLPrefix[]          = "zerosuggest-url-prefix";
+
 #if defined(OS_ANDROID)
 // Use the tablet specific UI components when available.
 const char kTabletUI[]                      = "tablet-ui";