Add options to disable each of the two aspects of the prerender service

chrome/browser/prerender/prerender_field_trial.cc

Index: chrome/browser/prerender/prerender_field_trial.cc
===================================================================
--- chrome/browser/prerender/prerender_field_trial.cc	(revision 222044)
+++ chrome/browser/prerender/prerender_field_trial.cc	(working copy)
@@ -47,6 +47,10 @@
 const char kPrerenderAlwaysControlKeyName[] = "PrerenderAlwaysControl";
 const char kPrerenderQueryPrerenderServiceKeyName[] =
     "PrerenderQueryPrerenderService";
+const char kPrerenderQueryPrerenderServiceCurrentURLKeyName[] =
+    "PrerenderQueryPrerenderServiceCurrentURL";
+const char kPrerenderQueryPrerenderServiceCandidateURLsKeyName[] =
+    "PrerenderQueryPrerenderServiceCandidateURLs";
 const char kPrerenderServiceBehaviorIDKeyName[] = "PrerenderServiceBehaviorID";
 const char kPrerenderServiceFetchTimeoutKeyName[] =
     "PrerenderServiceFetchTimeoutMs";
@@ -373,6 +377,16 @@
       kEnabledGroup;
 }
 
+bool ShouldQueryPrerenderServiceForCurrentURL() {
+  return GetLocalPredictorSpecValue(
+      kPrerenderQueryPrerenderServiceCurrentURLKeyName) != kDisabledGroup;
+}
+
+bool ShouldQueryPrerenderServiceForCandidateURLs() {
+  return GetLocalPredictorSpecValue(
+      kPrerenderQueryPrerenderServiceCandidateURLsKeyName) != kDisabledGroup;
+}
+
 string GetPrerenderServiceURLPrefix() {
   string prefix = chrome_variations::GetVariationParamValue(
       kLocalPredictorSpecTrialName,