Import cairo and pixman (a dependency of cairo) into third_party/ on Win and ...

DEPS

 vars = {
   "chromium_trunk": "http://src.chromium.org/svn/trunk",
   "nixysa_rev": "73",
   # When updating the chromium rev, you must also update the nss and sqlite
   # revs to match the version pulled-in by Chromium's own DEPS in the new rev.
   "chromium_rev": "51794",
   "chromium_breakpad_rev": "47985",
-  "o3d_code_rev": "227",
+  "o3d_code_rev": "229",
   "skia_rev": "586",
   "gyp_rev": "820",
   "gtest_rev": "408",
   "gflags_rev": "30",
   "breakpad_rev": "604",
   "v8_rev": "5017",
 }
 
 deps = {
   "o3d/o3d_assets":
@@ skipping 133 matching lines @@
 deps_os = {
   "win": {
     "third_party/wix_2_0_4221":
       "http://o3d.googlecode.com/svn/trunk/googleclient/third_party/wix_2_0_4221@" + Var("o3d_code_rev"),
 
     "third_party/cygwin":
       "/trunk/deps/third_party/cygwin@11984",
 
     "third_party/python_24":
       Var("chromium_trunk") + "/deps/third_party/python_24@19441",
+
+    "third_party/pixman":
+      "http://o3d.googlecode.com/svn/trunk/googleclient/third_party/pixman@" + Var("o3d_code_rev"),
+
+    "third_party/cairo":
+      "http://o3d.googlecode.com/svn/trunk/googleclient/third_party/cairo@" + Var("o3d_code_rev"),
+  },
+  "mac": {
+    "third_party/pixman":
+      "http://o3d.googlecode.com/svn/trunk/googleclient/third_party/pixman@" + Var("o3d_code_rev"),
+
+    "third_party/cairo":
+      "http://o3d.googlecode.com/svn/trunk/googleclient/third_party/cairo@" + Var("o3d_code_rev"),
   },
   "unix": {
     # Linux, really.
     "tools/xdisplaycheck":
       Var("chromium_trunk") + "/src/tools/xdisplaycheck@" + Var("chromium_rev"),
   },
 }
 
 hooks = [
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": "\\.gypi?$|[/\\\\]src[/\\\\]tools[/\\\\]gyp[/\\\\]|[/\\\\]src[/\\\\]o3d[/\\\\]build[/\\\\]gyp_o3d$|MANIFEST$",
     "action": ["python", "o3d/build/gyp_o3d", "o3d/build/o3d.gyp", "o3d/tests/lab/ChangeResolution/change_resolution.gyp"],
   },
 ]