Update third_party/cld_2 to r163 for simplified headers

This change makes the CLD2 header files ok to use regardless of whether or not
the CLD2_DYNAMIC_MODE define is set when including them. No-op implementations
have been added to the C++ code in CLD2 for the cases where client code
incorrectly calls dynamic-mode methods with a non-dynamic build of the library.
This allows including projects (such as Chromium) to opt for runtime checks
instead of compile-time checks when dealing with CLD2, which in turn greatly
simplifies the build logic for code that depends on CLD2.

BUG=367239
TBR=toyoshim

Review URL: https://codereview.chromium.org/422493002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@285581 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -309,7 +309,7 @@ deps = {
     "/trunk/deps/third_party/mesa@265279",
 
   "src/third_party/cld_2/src":
-    (Var("googlecode_url") % "cld2") + "/trunk@161",
+    (Var("googlecode_url") % "cld2") + "/trunk@163",
 
   "src/chrome/browser/resources/pdf/html_office":
      Var("chromium_git") +