Add fieldtrial testing config for NTPUseGoogleLocalNtp

This includes the features UseGoogleLocalNtp, DoodlesOnLocalNtp, and
VoiceSearchOnLocalNtp. The latter already had a testing config, which
is now merged into this one.

Bug: 583289
Change-Id: I00246241281f5365dcaab9f2d7bdc89ea3123e23
Reviewed-on: https://chromium-review.googlesource.com/789835
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520151}

testing/variations/fieldtrial_testing_config.json

@@ -2106,6 +2106,29 @@
             ]
         }
     ],
+    "NTPUseGoogleLocalNtp": [
+        {
+            "platforms": [
+                "chromeos",
+                "linux",
+                "mac",
+                "win"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "params": {
+                        "local_ntp_interactive_doodles": "false"
+                    },
+                    "enable_features": [
+                        "DoodlesOnLocalNtp",
+                        "UseGoogleLocalNtp",
+                        "VoiceSearchOnLocalNtp"
+                    ]
+                }
+            ]
+        }
+    ],
     "NetAdaptiveProxyConnectionTimeout": [
         {
             "platforms": [
@@ -4061,24 +4084,6 @@
             ]
         }
     ],
-    "VoiceSearchOnLocalNtp": [
-        {
-            "platforms": [
-                "chromeos",
-                "linux",
-                "mac",
-                "win"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "VoiceSearchOnLocalNtp"
-                    ]
-                }
-            ]
-        }
-    ],
     "VsyncAlignedInput": [
         {
             "platforms": [