Switching from CLD2 to CLD3

This CL switches from the old language detection model to the new one.

BUG=

Review-Url: https://codereview.chromium.org/2507213002
Cr-Commit-Position: refs/heads/master@{#432769}
diff --git a/third_party/cld/BUILD.gn b/third_party/cld/BUILD.gn
index 890cc54c..19dd230 100644
--- a/third_party/cld/BUILD.gn
+++ b/third_party/cld/BUILD.gn
@@ -5,7 +5,7 @@
 import("//build/buildflag_header.gni")
 
 # Specifies which language identification model to use: CLD2 or CLD3.
-cld_version = 2
+cld_version = 3
 
 buildflag_header("cld_version") {
   header = "cld_version.h"