Remove http_throttling.may_experiment pref.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 0ddfec20a5106dec80e8732d729acffd124413fb..765a4ae5ef5fe4dd4b877ebfd89b2370b74faf7e 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -882,12 +882,6 @@ const char kPinnedTabs[] = "pinned_tabs";
 // Boolean that is true when HTTP throttling is enabled.
 const char kHttpThrottlingEnabled[] = "http_throttling.enabled";
 
-// Boolean that is true until the user changes the setting of the check-box
-// that controls whether HTTP throttling is enabled. When this is false,
-// we do not allow FieldTrial experiments to modify whether the feature
-// is enabled or not.
-const char kHttpThrottlingMayExperiment[] = "http_throttling.may_experiment";
-
 // Integer containing the default Geolocation content setting.
 const char kGeolocationDefaultContentSetting[] =
     "geolocation.default_content_setting";