[SVGDom] Add <circle>, <ellipse> support

gyp/svg.gyp

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 {
   'targets': [
     {
       'target_name': 'svg',
       'product_name': 'skia_svg',
       'type': 'static_library',
@@ skipping 30 matching lines @@
       ],
       'include_dirs': [
         '<(skia_include_path)/private',
         '../experimental/svg/model',
       ],
       'sources': [
         '../experimental/svg/model/SkSVGAttribute.h',
         '../experimental/svg/model/SkSVGAttribute.cpp',
         '../experimental/svg/model/SkSVGAttributeParser.h',
         '../experimental/svg/model/SkSVGAttributeParser.cpp',
+        '../experimental/svg/model/SkSVGCircle.h',
+        '../experimental/svg/model/SkSVGCircle.cpp',
         '../experimental/svg/model/SkSVGContainer.h',
         '../experimental/svg/model/SkSVGContainer.cpp',
         '../experimental/svg/model/SkSVGDOM.h',
         '../experimental/svg/model/SkSVGDOM.cpp',
+        '../experimental/svg/model/SkSVGEllipse.h',
+        '../experimental/svg/model/SkSVGEllipse.cpp',
         '../experimental/svg/model/SkSVGG.h',
         '../experimental/svg/model/SkSVGNode.h',
         '../experimental/svg/model/SkSVGNode.cpp',
         '../experimental/svg/model/SkSVGPath.h',
         '../experimental/svg/model/SkSVGPath.cpp',
         '../experimental/svg/model/SkSVGPoly.h',
         '../experimental/svg/model/SkSVGPoly.cpp',
         '../experimental/svg/model/SkSVGRect.h',
         '../experimental/svg/model/SkSVGRect.cpp',
         '../experimental/svg/model/SkSVGRenderContext.h',
@@ skipping 10 matching lines @@
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '../experimental/svg/model',
         ],
       },
     },
 
   ],
 }