UseDdljsonApi: Use same trial name in about:flags and testing config

Before, the field trial was called "NTPUseDdljsonApi" in
fieldtrial_testing_config.json, but "UseDdljsonApi" in the about:flags
override. This caused developer builds to crash on startup if one of
the about:flags overrides was selected.

Bug: 690467
Change-Id: I2cfcf42360ecfc2b548830df9934df4695dc5d9d
Reviewed-on: https://chromium-review.googlesource.com/603791
Commit-Queue: Marc Treib <[email protected]>
Reviewed-by: Sylvain Defresne <[email protected]>
Cr-Commit-Position: refs/heads/master@{#492323}
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index b70497b..413e9ec 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -3233,7 +3233,7 @@
      FEATURE_WITH_PARAMS_VALUE_TYPE(
          search_provider_logos::features::kUseDdljsonApi,
          kUseDdljsonApiVariations,
-         search_provider_logos::features::kUseDdljsonApi.name)},
+         "NTPUseDdljsonApi")},
 #endif  // defined(OS_ANDROID)
 
 #if defined(OS_ANDROID)