[AiS] Added version parameter to search query.

Answers in Suggest requires a version number on all suggest queries.
Add a gs_rn=42 attribute to requests if Answers is enabled.

BUG=370192

Review URL: https://codereview.chromium.org/269293002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269486 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/search_engines/prepopulated_engines.json

@@ -27,7 +27,7 @@
 
     // Increment this if you change the data in ways that mean users with
     // existing data should get a new version.
-    "kCurrentDataVersion": 73
+    "kCurrentDataVersion": 74
   },
 
   // The following engines are included in country lists and are added to the
@@ -526,7 +526,7 @@
       "keyword": "google.com",
       "favicon_url": "http://www.google.com/favicon.ico",
       "search_url": "{google:baseURL}search?q={searchTerms}&{google:RLZ}{google:originalQueryForSuggestion}{google:assistedQueryStats}{google:searchFieldtrialParameter}{google:bookmarkBarPinned}{google:searchClient}{google:sourceId}{google:instantExtendedEnabledParameter}{google:omniboxStartMarginParameter}ie={inputEncoding}",
-      "suggest_url": "{google:baseSuggestURL}search?{google:searchFieldtrialParameter}client={google:suggestClient}&gs_ri={google:suggestRid}&xssi=t&q={searchTerms}&{google:cursorPosition}{google:currentPageUrl}{google:pageClassification}sugkey={google:suggestAPIKeyParameter}",
+      "suggest_url": "{google:baseSuggestURL}search?{google:searchFieldtrialParameter}client={google:suggestClient}&gs_ri={google:suggestRid}&xssi=t&q={searchTerms}&{google:cursorPosition}{google:currentPageUrl}{google:pageClassification}{google:searchVersion}sugkey={google:suggestAPIKeyParameter}",
       "instant_url": "{google:baseURL}webhp?sourceid=chrome-instant&{google:RLZ}{google:forceInstantResults}{google:instantExtendedEnabledParameter}{google:ntpIsThemedParameter}{google:omniboxStartMarginParameter}ie={inputEncoding}",
       "image_url": "{google:baseURL}searchbyimage/upload",
       "new_tab_url": "{google:baseURL}_/chrome/newtab?{google:RLZ}{google:instantExtendedEnabledParameter}{google:ntpIsThemedParameter}ie={inputEncoding}",

chrome/browser/search_engines/template_url.cc

@@ -84,6 +84,9 @@ const char kGoogleRLZParameter[] = "google:RLZ";
 const char kGoogleSearchClient[] = "google:searchClient";
 const char kGoogleSearchFieldtrialParameter[] =
     "google:searchFieldtrialParameter";
+#if defined (OS_ANDROID)
+const char kGoogleSearchVersion[] = "google:searchVersion";
+#endif
 const char kGoogleSourceIdParameter[] = "google:sourceId";
 const char kGoogleSuggestAPIKeyParameter[] = "google:suggestAPIKeyParameter";
 const char kGoogleSuggestClient[] = "google:suggestClient";
@@ -601,6 +604,13 @@ bool TemplateURLRef::ParseParameter(size_t start,
     replacements->push_back(Replacement(GOOGLE_SEARCH_CLIENT, start));
   } else if (parameter == kGoogleSearchFieldtrialParameter) {
     replacements->push_back(Replacement(GOOGLE_SEARCH_FIELDTRIAL_GROUP, start));
+#if defined(OS_ANDROID)
+  } else if (parameter == kGoogleSearchVersion) {
+    if (CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kEnableAnswersInSuggest)) {
+      url->insert(start, "gs_rn=42&");
+    }
+#endif
   } else if (parameter == kGoogleSourceIdParameter) {
 #if defined(OS_ANDROID)
     url->insert(start, "sourceid=chrome-mobile&");

chrome/browser/search_engines/template_url_unittest.cc

@@ -1324,3 +1324,22 @@ TEST_F(TemplateURLTest, ReflectsBookmarkBarPinned) {
   result = url.url_ref().ReplaceSearchTerms(search_terms_args);
   EXPECT_EQ("http://www.google.com/?bmbp=1&q=foo", result);
 }
+
+#if defined(OS_ANDROID)
+TEST_F(TemplateURLTest, AnswersHasVersion) {
+  TemplateURLData data;
+  UIThreadSearchTermsData::SetGoogleBaseURL("http://bar/");
+  data.SetURL("http://bar/search?q={searchTerms}&{google:searchVersion}xssi=t");
+
+  TemplateURL url(NULL, data);
+  TemplateURLRef::SearchTermsArgs search_terms_args(ASCIIToUTF16("foo"));
+  std::string result = url.url_ref().ReplaceSearchTerms(search_terms_args);
+  EXPECT_EQ("http://bar/search?q=foo&xssi=t", result);
+
+  CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kEnableAnswersInSuggest);
+  TemplateURL url2(NULL, data);
+  result = url2.url_ref().ReplaceSearchTerms(search_terms_args);
+  EXPECT_EQ("http://bar/search?q=foo&gs_rn=42&xssi=t", result);
+}
+#endif