mojo: make libmojo_public_test_support a static library.

mojo/mojo_js_integration_tests.isolate

 # Copyright 2016 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.
 {
   'includes': [
+    '../base/base.isolate',
     '../gin/v8.isolate',
-    '../mojo/mojo.isolate',
     '../third_party/icu/icu.isolate',
   ],
   'conditions': [
     ['OS=="win" or OS=="mac" or OS=="linux"', {
       'variables': {
         'command': [
           '../testing/test_env.py',
           '<(PRODUCT_DIR)/mojo_js_integration_tests<(EXECUTABLE_SUFFIX)',
           '--brave-new-test-launcher',
           '--test-launcher-bot-mode',
@@ skipping 22 matching lines @@
           '<(PRODUCT_DIR)/gen/mojo/public/interfaces/bindings/tests/test_native_types.mojom.js',
           '<(PRODUCT_DIR)/gen/mojo/public/interfaces/bindings/tests/test_structs.mojom.js',
           '<(PRODUCT_DIR)/gen/mojo/public/interfaces/bindings/tests/test_sync_methods.mojom.js',
           '<(PRODUCT_DIR)/gen/mojo/public/interfaces/bindings/tests/test_unions.mojom.js',
           '<(PRODUCT_DIR)/gen/mojo/public/interfaces/bindings/tests/validation_test_interfaces.mojom.js',
         ],
       },
     }],
   ],
 }