Update ChromeFrame reference build to 51194 to fix a crash during chrome fram...

DEPS

 vars = {
   "webkit_trunk":
   "http://svn.webkit.org/repository/webkit/trunk",
   "webkit_revision": "62145",
   "ffmpeg_revision": "49485",
   "skia_revision": "583",
   "chromium_git": "http://src.chromium.org/git",
   "swig_revision": "40423",
   "nacl_revision": "2587",
   "libvpx_revision": "47941",
@@ skipping 169 matching lines @@
     "src/third_party/lighttpd":
       "/trunk/deps/third_party/lighttpd@33727",
 
     "src/third_party/ffmpeg/binaries/chromium/win/ia32":
       "/trunk/deps/third_party/ffmpeg/binaries/win@" + Var("ffmpeg_revision"),
 
     # Chrome Frame related deps
     "src/third_party/xulrunner-sdk":
       "/trunk/deps/third_party/xulrunner-sdk@17887",
     "src/chrome_frame/tools/test/reference_build/chrome":
-      "/trunk/deps/reference_builds/chrome@41984",
+      "/trunk/deps/reference_builds/chrome@51194",
 
     # Parses Windows PE/COFF executable format.
     "src/third_party/pefile":
       "http://pefile.googlecode.com/svn/trunk@63",
 
     # NSS, for SSLClientSocketNSS.
     "src/third_party/nss":
       "/trunk/deps/third_party/nss@48440",
 
     "src/third_party/swig/win":
@@ skipping 84 matching lines @@
 
 
 hooks = [
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]