[libfuzzer] fetch libfuzzer on mac and register it in build root.

DEPS

 # This file is used to manage the dependencies of the Chromium src repo. It is
 # used by gclient to determine what version of each dependency to check out, and
 # where.
 #
 # For more information, please refer to the official documentation:
 #   https://sites.google.com/a/chromium.org/dev/developers/how-tos/get-the-code
 #
 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 #
@@ skipping 264 matching lines @@
 
   'src/third_party/catapult':
     Var('chromium_git') + '/external/github.com/catapult-project/catapult.git' + '@' +
     Var('catapult_revision'),
 
   'src/third_party/openh264/src':
     Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + 'b37cda248234162033e3e11b0335f3131cdfe488',
 
   'src/third_party/re2/src':
     Var('chromium_git') + '/external/github.com/google/re2.git' + '@' + 'dba3349aba83b5588e85e5ecf2b56c97f2d259b7',
+
+  # Used for building libFuzzers (only supports Linux).

[Dirk Pranke, 2016/04/14 23:20:38]

the "only supports linux" part is no longer accurate, right?

[Oliver Chang, 2016/04/14 23:30:22]

remove "(only supports Linux)" ?

+  'src/third_party/libFuzzer/src':
+    Var('chromium_git') + '/chromium/llvm-project/llvm/lib/Fuzzer.git' + '@' +  Var('libfuzzer_revision'),
 }
 
 
 deps_os = {
   'win': {
     'src/third_party/cygwin':
      Var('chromium_git') + '/chromium/deps/cygwin.git' + '@' + 'c89e446b273697fadf3a10ff1007a97c0b7de6df',
 
     'src/third_party/psyco_win32':
      Var('chromium_git') + '/chromium/deps/psyco_win32.git' + '@' + 'f5af9f6910ee5a8075bbaeed0591469f1661d868',
@@ skipping 132 matching lines @@
     'src/third_party/wayland/src':
      Var('chromium_git') + '/external/anongit.freedesktop.org/git/wayland/wayland.git' + '@' + '7ed00c1de77afbab23f4908fbd9d60ec070c209b',
 
     # Wayland protocols that add functionality not available in the core protocol.
     'src/third_party/wayland-protocols/src':
      Var('chromium_git') + '/external/anongit.freedesktop.org/git/wayland/wayland-protocols.git' + '@' + '596dfda882a51c05699bcb28a8459ce936a138db',
 
     # Wireless Display Software. Used on Chrome OS.
     'src/third_party/wds/src':
      Var('chromium_git') + '/external/github.com/01org/wds' + '@' + 'f187dda5fccaad08e168dc6657109325f42c648e',
-
-    # Used for building libFuzzers (only supports Linux).
-    'src/third_party/libFuzzer/src':
-     Var('chromium_git') + '/chromium/llvm-project/llvm/lib/Fuzzer.git' + '@' +  Var('libfuzzer_revision'),
   },
   'android': {
     'src/third_party/android_protobuf/src':
      Var('chromium_git') + '/external/android_protobuf.git' + '@' + '999188d0dc72e97f7fe08bb756958a2cf090f4e7',
 
     'src/third_party/android_tools':
      Var('chromium_git') + '/android_tools.git' + '@' + 'adfd31794011488cd0fc716b53558b2d8a67af8b',
 
     'src/third_party/apache-mime4j':
      Var('chromium_git') + '/chromium/deps/apache-mime4j.git' + '@' + '28cb1108bff4b6cf0a2e86ff58b3d025934ebe3a',
@@ skipping 402 matching lines @@
     'pattern': '\\.sha1',
     'action': ['python', 'src/third_party/instrumented_libraries/scripts/download_binaries.py'],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     'name': 'gyp',
     'pattern': '.',
     'action': ['python', 'src/build/gyp_chromium'],
   },
 ]