Update ots to r83.

DEPS

 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.
   "googlecode_url": "http://%s.googlecode.com/svn",
   "sourceforge_url": "http://%(repo)s.svn.sourceforge.net/svnroot/%(repo)s",
   "webkit_trunk": "http://svn.webkit.org/repository/webkit/trunk",
   "nacl_trunk": "http://src.chromium.org/native_client/trunk",
   "webkit_revision": "109636",
   "chromium_git": "http://git.chromium.org/git",
   "swig_revision": "69281",
@@ skipping 146 matching lines @@
   "src/third_party/WebKit/Tools/DumpRenderTree":
     Var("webkit_trunk") + "/Tools/DumpRenderTree@" + Var("webkit_revision"),
 
   "src/third_party/WebKit/Tools/Scripts":
     Var("webkit_trunk") + "/Tools/Scripts@" + Var("webkit_revision"),
 
   "src/third_party/WebKit/Tools/TestWebKitAPI":
     Var("webkit_trunk") + "/Tools/TestWebKitAPI@" + Var("webkit_revision"),
 
   "src/third_party/ots":
-    (Var("googlecode_url") % "ots") + "/trunk@82",
+    (Var("googlecode_url") % "ots") + "/trunk@83",
 
   "src/tools/page_cycler/acid3":
     "/trunk/deps/page_cycler/acid3@102714",
 
   "src/chrome/test/data/perf/canvas_bench":
     "/trunk/deps/canvas_bench@122605",
 
   "src/chrome/test/data/perf/frame_rate/content":
     "/trunk/deps/frame_rate/content@93671",
 
@@ skipping 335 matching lines @@
     "pattern": ".",
     "action": ["python", "src/build/util/lastchange.py",
                "-o", "src/build/util/LASTCHANGE"],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]