Canvas API. There are still a number of things to do:

samples/openglui/emulator/emulator.gyp

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # We should be able to make this work on Mac. We need:
 # -framework OpenGL -framework GLUT -lm -L /usr/X11/lib
 
 {
   'targets': [
     {
@@ skipping 11 matching lines @@
         ]
       ]
     },
     {
       'target_name': 'copy_dart_files',
       'type': 'none',
       'copies': [ {
         'destination': '<(PRODUCT_DIR)',
         'files': [
            '../../../runtime/embedders/openglui/common/gl.dart',
-           '../src/raytrace.dart'
+           '../src/openglui_raytrace.dart',
+           '../src/openglui_canvas_tests.dart'
         ],
       }],
     },
     {
       'target_name': 'mobile_emulator',
       'type': 'executable',
       'dependencies': [
         '../../../runtime/dart-runtime.gyp:emulator_embedder',
       ],
       'include_dirs': [
          '../../../runtime',
          '/usr/X11/include',
        ],
        'sources': [
           'mobile_emulator_sample.cc',
        ],
        'conditions': [
          ['OS=="linux"',
            {
              'link_settings': {
-               'libraries': [ '-lGL', '-lglut', '-lGLU', '-lm', '-lc' ],
+               'libraries': [
+                 '-Wl,--start-group',
+                 '-lskia_effects',
+                 '-lskia_images',
+                 '-lskia_core',
+                 '-lskia_opts',
+                 '-lskia_opts_ssse3',
+                 '-lskia_ports',
+                 '-lskia_sfnt',
+                 '-lskia_utils',
+                 '-lskia_gr',
+                 '-lskia_skgr',
+                 '-Wl,--end-group',
+                 '-lfreetype',
+                 '-lGL',
+                 '-lglut',
+                 '-lGLU',
+                 '-lm',
+                 '-lc' ],
+              'ldflags': [
+                '-Wall',
+                '-g',
+                # TODO(gram): handle release mode.
+                '-Lthird_party/skia-desktop/trunk/out/Debug',
+              ],
              },
            }
          ],
          ['OS=="mac"',
            {
              'ldflags': [
                '-framework OpenGL',
                '-framework GLUT',
                '-L /usr/X11/lib'
              ],
            }
         ]
       ]
     }
   ]
 }