Prerender: omnibox and instant field trial parameters.

chrome/browser/prerender/prerender_field_trial.h

Index: chrome/browser/prerender/prerender_field_trial.h
diff --git a/chrome/browser/prerender/prerender_field_trial.h b/chrome/browser/prerender/prerender_field_trial.h
index ce5a487853087fc41ec8603ff3fa07d448cecca1..2e74b209c3c6a6dded17f8a6388c00ef32339bda 100644
--- a/chrome/browser/prerender/prerender_field_trial.h
+++ b/chrome/browser/prerender/prerender_field_trial.h
@@ -13,9 +13,12 @@ namespace prerender {
 
 extern const base::Feature kNoStatePrefetchFeature;
 extern const char kNoStatePrefetchFeatureModeParameterName[];
+extern const char kNoStatePrefetchFeatureInstantModeParameterName[];

[pasko, 2017/03/17 17:33:33]

nit: maybe add a comment that these are exposed outside the .cc for testing
only? I'd actually prefer to duplicate the strings in the tests, but it's better
be done later.

[mattcary, 2017/03/20 10:20:31]

Done.

I go both ways on duplicating strings in the tests. 

+extern const char kNoStatePrefetchFeatureOmniboxModeParameterName[];
 extern const char kNoStatePrefetchFeatureModeParameterPrefetch[];
 extern const char kNoStatePrefetchFeatureModeParameterPrerender[];
 extern const char kNoStatePrefetchFeatureModeParameterSimpleLoad[];
+extern const char kNoStatePrefetchFeatureModeParameterDisabled[];
 
 // Configures prerender using kNoStatePrefetchFeature and field trial
 // parameters.