Use InitializeBlinkFuzzTest instead of ScopedUnittestsEnvironmentSetup.

third_party/WebKit/Source/platform/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
@@ skipping 1984 matching lines @@
     "//content/test:test_support",
   ]
 }
 
 # Fuzzer for blink::MHTMLParser.
 fuzzer_test("mhtml_parser_fuzzer") {
   sources = [
     "mhtml/MHTMLFuzzer.cpp",
   ]
   deps = [
-    ":blink_common",
+    ":blink_fuzzer_test_support",
     ":platform",
-    ":test_support",
   ]
   dict = "//testing/libfuzzer/fuzzers/dicts/mhtml.dict"
   seed_corpus = "//third_party/WebKit/LayoutTests/mhtml"
   additional_configs = [
     "//third_party/WebKit/Source/wtf:wtf_config",
     "//third_party/WebKit/Source:config",
   ]
 }
 
 # Fuzzer for blink::WebIconSizesParser.
@@ skipping 72 matching lines @@
     "//third_party/WebKit/Source:config",
     "//third_party/WebKit/Source:inside_blink",
   ]
 
   deps = [
     ":test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }