Field trial to disable google logo on local ntp.

Adds a field trial option to disable the custom treatment on the local
NTP when Google is the DSP. It's unclear if we need this config now.

BUG=
R=samarth@chromium.org

Review URL: https://codereview.chromium.org/156123002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249208 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 29 insertions, 1 deletions

diff --git a/chrome/browser/search/local_ntp_source.cc b/chrome/browser/search/local_ntp_source.cc
index 6e668d7..8944ac3 100644
--- a/chrome/browser/search/local_ntp_source.cc
+++ b/chrome/browser/search/local_ntp_source.cc
@@ -105,7 +105,8 @@ std::string GetConfigData(Profile* profile) {
   base::DictionaryValue config_data;
   config_data.Set("translatedStrings", GetTranslatedStrings().release());
   config_data.SetBoolean("isGooglePage",
-                         DefaultSearchProviderIsGoogle(profile));
+                         DefaultSearchProviderIsGoogle(profile) &&
+                         chrome::ShouldShowGoogleLocalNTP());
 
   // Serialize the dictionary.
   std::string js_text;
diff --git a/chrome/browser/search/search.cc b/chrome/browser/search/search.cc
index 1562d52..2ba4567 100644
--- a/chrome/browser/search/search.cc
+++ b/chrome/browser/search/search.cc
@@ -72,6 +72,7 @@ const char kOriginChipFlagName[] = "origin_chip";
 #if !defined(OS_IOS) && !defined(OS_ANDROID)
 const char kEnableQueryExtractionFlagName[] = "query_extraction";
 #endif
+const char kShouldShowGoogleLocalNTPFlagName[] = "google_local_ntp";
 
 // Constants for the field trial name and group prefix.
 // Note in M30 and below this field trial was named "InstantExtended" and in
@@ -611,6 +612,12 @@ OriginChipPosition GetOriginChipPosition() {
       ORIGIN_CHIP_DISABLED;
 }
 
+bool ShouldShowGoogleLocalNTP() {
+  FieldTrialFlags flags;
+  return !GetFieldTrialInfo(&flags) || GetBoolValueForFlagWithDefault(
+      kShouldShowGoogleLocalNTPFlagName, true, flags);
+}
+
 GURL GetEffectiveURLForInstant(const GURL& url, Profile* profile) {
   CHECK(ShouldAssignURLToInstantRenderer(url, profile))
       << "Error granting Instant access.";
diff --git a/chrome/browser/search/search.h b/chrome/browser/search/search.h
index 0e9e826..49ffb4e 100644
--- a/chrome/browser/search/search.h
+++ b/chrome/browser/search/search.h
@@ -172,6 +172,10 @@ bool ShouldDisplayOriginChip();
 // toolbar.
 OriginChipPosition GetOriginChipPosition();
 
+// Returns true if the local new tab page should show a Google logo and search
+// box for users whose default search provider is Google, or false if not.
+bool ShouldShowGoogleLocalNTP();
+
 // Transforms the input |url| into its "effective URL". The returned URL
 // facilitates grouping process-per-site. The |url| is transformed, for
 // example, from
diff --git a/chrome/browser/search/search_unittest.cc b/chrome/browser/search/search_unittest.cc
index ac18957..afe3bdd 100644
--- a/chrome/browser/search/search_unittest.cc
+++ b/chrome/browser/search/search_unittest.cc
@@ -713,6 +713,22 @@ TEST_F(SearchTest, ShouldReuseInstantSearchBasePage_DisabledViaFinch) {
   EXPECT_EQ(89ul, EmbeddedSearchPageVersion());
 }
 
+TEST_F(SearchTest, ShouldShowGoogleLocalNTP_Default) {
+  EXPECT_TRUE(ShouldShowGoogleLocalNTP());
+}
+
+TEST_F(SearchTest, ShouldShowGoogleLocalNTP_EnabledViaFinch) {
+  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
+      "EmbeddedSearch", "Group1 espv:2 google_local_ntp:1"));
+  EXPECT_TRUE(ShouldShowGoogleLocalNTP());
+}
+
+TEST_F(SearchTest, ShouldShowGoogleLocalNTP_DisabledViaFinch) {
+  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
+      "EmbeddedSearch", "Group1 espv:2 google_local_ntp:0"));
+  EXPECT_FALSE(ShouldShowGoogleLocalNTP());
+}
+
 TEST_F(SearchTest, IsNTPURL) {
   GURL invalid_url;
   GURL ntp_url(chrome::kChromeUINewTabURL);