PPAPI Testing: Clean up location of ppapi::StripTestPrefixes

ppapi/shared_impl/BUILD.gn

 # Copyright 2015 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.
 
 component("shared_impl") {
   output_name = "ppapi_shared"
 
   sources = [
     "array_var.cc",
     "array_var.h",
@@ skipping 175 matching lines @@
     libs = [ "QuartzCore.framework" ]
   }
 }
 
 source_set("test_support") {
   testonly = true
 
   sources = [
     "test_globals.cc",
     "test_globals.h",
-    "unittest_utils.cc",
-    "unittest_utils.h",
+    "test_utils.cc",
+    "test_utils.h",
   ]
 
   deps = [
     "//base/test:test_support",
     "//ipc",
     "//ipc:test_support",
     "//ppapi/proxy",
     "//ppapi/shared_impl",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }