[NTP] Add fieldtrial config for hiding the fakebox on the New Tab Page

Bug: 923563
Change-Id: I9b1b3b84f35a312deac8ad8b0b286d64c3b6b2a2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1474674
Commit-Queue: Kristi Park <kristipark@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Ramya Nagarajan <ramyan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638734}

chrome/browser/ui/search/local_ntp_browsertest.cc

@@ -90,7 +90,7 @@ class LocalNTPTest : public InProcessBrowserTest {
 
   LocalNTPTest()
       : LocalNTPTest(/*enabled_features=*/{features::kUseGoogleLocalNtp},
-                     /*disabled_features=*/{}) {}
+                     /*disabled_features=*/{features::kRemoveNtpFakebox}) {}
 
   void SetUpOnMainThread() override {
     // Some tests depend on the prepopulated most visited tiles coming from

chrome/browser/ui/search/local_ntp_doodle_browsertest.cc

@@ -254,7 +254,8 @@ class LocalNTPDoodleTest : public InProcessBrowserTest {
  private:
   void SetUp() override {
     feature_list_.InitWithFeatures(
-        {features::kUseGoogleLocalNtp, features::kDoodlesOnLocalNtp}, {});
+        {features::kUseGoogleLocalNtp, features::kDoodlesOnLocalNtp},
+        {features::kRemoveNtpFakebox});
     InProcessBrowserTest::SetUp();
   }
 

chrome/browser/ui/search/local_ntp_uitest.cc

@@ -35,7 +35,9 @@ class LocalNTPUITest : public InProcessBrowserTest {
 
  private:
   void SetUp() override {
-    feature_list_.InitAndEnableFeature(features::kUseGoogleLocalNtp);
+    feature_list_.InitWithFeatures(
+        /*enabled_features=*/{features::kUseGoogleLocalNtp},
+        /*disabled_features=*/{features::kRemoveNtpFakebox});
     InProcessBrowserTest::SetUp();
   }
 

chrome/browser/ui/search/local_ntp_voice_search_browsertest.cc

@@ -31,7 +31,8 @@ class LocalNTPVoiceSearchSmokeTest : public InProcessBrowserTest {
 
  private:
   void SetUp() override {
-    feature_list_.InitWithFeatures({features::kUseGoogleLocalNtp}, {});
+    feature_list_.InitWithFeatures({features::kUseGoogleLocalNtp},
+                                   {features::kRemoveNtpFakebox});
     InProcessBrowserTest::SetUp();
   }
 

testing/variations/fieldtrial_testing_config.json

@@ -4002,6 +4002,24 @@
             ]
         }
     ],
+    "RemoveNTPFakebox": [
+        {
+            "platforms": [
+                "chromeos",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "RemoveNTPFakebox",
+                    "enable_features": [
+                        "RemoveNtpFakebox"
+                    ]
+                }
+            ]
+        }
+    ],
     "RendererSchedulerWakeUpThrottling": [
         {
             "platforms": [