Adds plumbing to pass WebUI mojo::Handle from browser to renderer

content/content_tests.gypi

Index: content/content_tests.gypi
diff --git a/content/content_tests.gypi b/content/content_tests.gypi
index 2568fafe52995f747d1bbaa9c653dc6f31bba5f8..3eb88bea0f5101c4bde8e2670ee2818c1038babc 100644
--- a/content/content_tests.gypi
+++ b/content/content_tests.gypi
@@ -923,6 +923,27 @@
           ],
         },
         {
+          'target_name': 'web_ui_test_mojo_bindings',
+          'type': 'static_library',
+          'dependencies': [
+            '../mojo/mojo.gyp:mojo_bindings',
+            '../mojo/mojo.gyp:mojo_system',
+          ],
+          'sources': [
+            'test/data/web_ui_test_mojo_bindings.mojom',
+          ],
+          # TODO(sky): this shouldn't be necessary. It's working around a bug in
+          # gyp.
+          'variables': {
+            'mojom_base_output_dir': 'content',
+          },
+          'includes': [ '../mojo/public/bindings/mojom_bindings_generator.gypi' ],
+          'export_dependent_settings': [
+            '../mojo/mojo.gyp:mojo_bindings',
+            '../mojo/mojo.gyp:mojo_system',
+          ],
+        },
+        {
           'target_name': 'content_browsertests',
           'type': '<(gtest_target_type)',
           'dependencies': [
@@ -1027,6 +1048,7 @@
             'browser/web_contents/web_contents_impl_browsertest.cc',
             'browser/web_contents/web_contents_view_aura_browsertest.cc',
             'browser/webkit_browsertest.cc',
+            'browser/webui/web_ui_mojo_browsertest.cc',
             'browser/worker_host/test/worker_browsertest.cc',
             'child/site_isolation_policy_browsertest.cc',
             'common/gpu/client/context_provider_command_buffer_browsertest.cc',
@@ -1063,6 +1085,19 @@
                 'browser/web_contents/touch_editable_impl_aura_browsertest.cc',
               ],
             }],
+            ['use_mojo==0', {
+              'sources!': [
+                'browser/webui/web_ui_mojo_browsertest.cc',
+              ],
+            }, {  # use_mojo==1
+              'dependencies': [
+                'web_ui_test_mojo_bindings',
+                '../mojo/mojo.gyp:mojo_bindings',
+                '../mojo/mojo.gyp:mojo_environment_chromium',
+                '../mojo/mojo.gyp:mojo_system',
+                '../mojo/mojo.gyp:mojo_system_impl',
+              ],
+            }],
             ['OS=="win"', {
               'resource_include_dirs': [
                 '<(SHARED_INTERMEDIATE_DIR)/webkit',