Add colorama to third_party/colorama

DEPS

Index: DEPS
diff --git a/DEPS b/DEPS
index 1da4f7b4fb613de05aed2526a7d91c181f74f06a..9a4f7bcabfb93f07b3ec7b4bd698349fcd796f3f 100644
--- a/DEPS
+++ b/DEPS
@@ -20,6 +20,7 @@
 vars = {
   # Use this googlecode_url variable only if there is an internal mirror for it.
   # If you do not know, use the full path while defining your new deps entry.
+  "github_url": "https://github.com/%s.git",
   "googlecode_url": "http://%s.googlecode.com/svn",
   "sourceforge_url": "http://svn.code.sf.net/p/%(repo)s/code",
   "llvm_url": "http://src.chromium.org/llvm-project",
@@ -84,6 +85,9 @@ deps = {
   "src/breakpad/src":
     (Var("googlecode_url") % "google-breakpad") + "/trunk/src@1331",
 
+  "src/third_party/colorama/src":
+    (Var("github_url") % "tartley/colorama") + "@799604a104",
+
   "src/buildtools":
     Var("chromium_git") + "/chromium/buildtools.git@" +
      Var("buildtools_revision"),