Add missing dependencies.

content/content_tests.gypi

 # Copyright (c) 2013 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.
 
 {
   'variables': {
     'layouttest_support_content_sources': [
       'public/test/layouttest_support.h',
       'public/test/nested_message_pump_android.cc',
       'public/test/nested_message_pump_android.h',
@@ skipping 997 matching lines @@
         '../testing/gtest.gyp:gtest',
         '../third_party/mojo/mojo_edk.gyp:mojo_common_test_support',
         '../third_party/mojo/mojo_public.gyp:mojo_cpp_bindings',
         '../third_party/re2/re2.gyp:re2',
         '../ui/accessibility/accessibility.gyp:accessibility',
         '../ui/base/ui_base.gyp:ui_base',
         '../ui/events/events.gyp:blink',
         '../ui/gfx/gfx.gyp:gfx',
         '../ui/gfx/gfx.gyp:gfx_geometry',
         '../ui/gfx/ipc/gfx_ipc.gyp:gfx_ipc',
+        # Only needed at runtime.
+        '../third_party/mesa/mesa.gyp:osmesa',
       ],
       'include_dirs': [
         '..',
         '<(SHARED_INTERMEDIATE_DIR)',  # Needed by render_media_client_unittest.cc.
       ],
       'sources': [ '<@(content_unittests_sources)' ],
       'conditions': [
         ['OS == "ios"', {
           'sources/': [
             # iOS only needs a small portion of content; exclude all the
@@ skipping 376 matching lines @@
             '../net/net.gyp:net_test_support',
             '../ppapi/ppapi_internal.gyp:ppapi_host',
             '../ppapi/ppapi_internal.gyp:ppapi_ipc',
             '../ppapi/ppapi_internal.gyp:ppapi_proxy',
             '../ppapi/ppapi_internal.gyp:ppapi_shared',
             '../ppapi/ppapi_internal.gyp:ppapi_unittest_shared',
             '../testing/gmock.gyp:gmock',
             '../testing/gtest.gyp:gtest',
             '../third_party/WebKit/public/blink.gyp:blink',
             '../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
-            '../third_party/mesa/mesa.gyp:osmesa',
             '../third_party/mojo/mojo_edk.gyp:mojo_common_test_support',
             '../third_party/mojo/mojo_edk.gyp:mojo_system_impl',
             '../third_party/mojo/mojo_public.gyp:mojo_cpp_bindings',
             '../third_party/mojo/mojo_public.gyp:mojo_js_bindings',
             '../third_party/zlib/zlib.gyp:zlib',
             '../ui/accessibility/accessibility.gyp:accessibility',
             '../ui/base/ui_base.gyp:ui_base',
             '../ui/gfx/gfx.gyp:gfx',
             '../ui/gfx/gfx.gyp:gfx_geometry',
             '../ui/gl/gl.gyp:gl',
             '../ui/gl/gl.gyp:gl_test_support',
             '../ui/resources/ui_resources.gyp:ui_resources',
             '../ui/shell_dialogs/shell_dialogs.gyp:shell_dialogs',
             '../ui/snapshot/snapshot.gyp:snapshot',
             '../ui/accessibility/accessibility.gyp:ax_gen',
+            # Only needed at runtime.
+            '../third_party/mesa/mesa.gyp:osmesa',
           ],
           'include_dirs': [
             '..',
             '<(SHARED_INTERMEDIATE_DIR)',  # Needed by encrypted_media_browsertest.cc
           ],
           'includes': [
             'browser/gpu/test_support_gpu.gypi',
           ],
           'defines': [
             'HAS_OUT_OF_PROC_TEST_RUNNER',
@@ skipping 661 matching lines @@
             ],
           },
           'includes': [
             '../build/host_jar.gypi',
           ],
         },
       ],
     }],
   ],
 }