A working implementation of AQS (Assisted Query Stats).

chrome/browser/search_engines/template_url.cc

Index: chrome/browser/search_engines/template_url.cc
diff --git a/chrome/browser/search_engines/template_url.cc b/chrome/browser/search_engines/template_url.cc
index 41d2675e06cc3e8ca588339a7ae678b0de7f0a66..185526436f6b23f4224c0450cf5dddefbbd39a20 100644
--- a/chrome/browser/search_engines/template_url.cc
+++ b/chrome/browser/search_engines/template_url.cc
@@ -42,6 +42,7 @@ const char kInputEncodingParameter[] = "inputEncoding";
 const char kOutputEncodingParameter[] = "outputEncoding";
 
 const char kGoogleAcceptedSuggestionParameter[] = "google:acceptedSuggestion";
+const char kGoogleAssistedQueryStatsParameter[] = "google:assistedQueryStats";
 // Host/Domain Google searches are relative to.
 const char kGoogleBaseURLParameter[] = "google:baseURL";
 const char kGoogleBaseURLParameterFull[] = "{google:baseURL}";
@@ -126,7 +127,9 @@ std::string TemplateURLRef::GetURL() const {
     case SEARCH:  return owner_->url();
     case SUGGEST: return owner_->suggestions_url();
     case INSTANT: return owner_->instant_url();
-    default:      NOTREACHED(); return std::string();
+    default:
+      NOTREACHED();
+      return std::string();
   }
 }
 
@@ -372,6 +375,15 @@ bool TemplateURLRef::HasGoogleBaseURLs() const {
   return false;
 }
 
+bool TemplateURLRef::SupportsAssistedQueryStats() const {
+  ParseIfNecessary();
+  for (size_t i = 0; i < replacements_.size(); ++i) {
+    if (replacements_[i].type == GOOGLE_ASSISTED_QUERY_STATS)
+      return true;
+  }
+  return false;
+}
+
 void TemplateURLRef::InvalidateCachedValues() const {
   supports_replacements_ = valid_ = parsed_ = false;
   host_.clear();
@@ -417,6 +429,8 @@ bool TemplateURLRef::ParseParameter(size_t start,
       url->insert(start, kOutputEncodingType);
   } else if (parameter == kGoogleAcceptedSuggestionParameter) {
     replacements->push_back(Replacement(GOOGLE_ACCEPTED_SUGGESTION, start));
+  } else if (parameter == kGoogleAssistedQueryStatsParameter) {
+    replacements->push_back(Replacement(GOOGLE_ASSISTED_QUERY_STATS, start));
   } else if (parameter == kGoogleBaseURLParameter) {
     replacements->push_back(Replacement(GOOGLE_BASE_URL, start));
   } else if (parameter == kGoogleBaseSuggestURLParameter) {