Re-organize Skia recipes

infra/bots/recipe_modules/skia/gn_flavor.py

-# 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.
-
-import default_flavor
-
-"""GN flavor utils, used for building Skia with GN."""
-class GNFlavorUtils(default_flavor.DefaultFlavorUtils):
-  def compile(self, target):
-    """Build Skia with GN."""
-    # Get the gn executable.
-    fetch_gn = self._skia_api.skia_dir.join('bin', 'fetch-gn')
-    self._skia_api.run(self._skia_api.m.step, 'fetch-gn', cmd=[fetch_gn],
-                       cwd=self._skia_api.skia_dir)
-
-    is_debug = 'is_debug=true'
-    if self._skia_api.configuration != 'Debug':
-        is_debug = 'is_debug=false'
-    gn_args = [is_debug]
-
-    is_clang = 'Clang' in self._skia_api.builder_name
-    is_gcc   = 'GCC'   in self._skia_api.builder_name
-
-    cc, cxx = 'cc', 'c++'
-    if is_clang:
-      cc, cxx = 'clang', 'clang++'
-    elif is_gcc:
-      cc, cxx = 'gcc', 'g++'
-
-    ccache = self._skia_api.ccache()
-    if ccache:
-      cc, cxx = '%s %s' % (ccache, cc), '%s %s' % (ccache, cxx)
-      if is_clang:
-        # Stifle "argument unused during compilation: ..." warnings.
-        stifle = '-Qunused-arguments'
-        cc, cxx = '%s %s' % (cc, stifle), '%s %s' % (cxx, stifle)
-
-    gn_args += [ 'cc="%s"' % cc, 'cxx="%s"' % cxx ]
-
-    # Run gn gen.
-    gn_exe = 'gn'
-    if self._skia_api.m.platform.is_win:
-        gn_exe = 'gn.exe'
-    gn_gen = [gn_exe, 'gen', self.out_dir, '--args=%s' % ' '.join(gn_args)]
-    self._skia_api.run(self._skia_api.m.step, 'gn_gen', cmd=gn_gen,
-                       cwd=self._skia_api.skia_dir)
-
-    # Run ninja.
-    ninja_cmd = ['ninja', '-C', self.out_dir]
-    self._skia_api.run(self._skia_api.m.step, 'compile %s' % target,
-            cmd=ninja_cmd,
-            cwd=self._skia_api.skia_dir)