Share link header parsing code between blink and content.

components/link_header_util/BUILD.gn

Index: components/link_header_util/BUILD.gn
diff --git a/components/client_update_protocol/BUILD.gn b/components/link_header_util/BUILD.gn
similarity index 65%
copy from components/client_update_protocol/BUILD.gn
copy to components/link_header_util/BUILD.gn
index e3af8836de7ce4fc0a6ec36f8b49b64352a6414e..6faef62389c66f9acdb0307557204d8924d368c6 100644
--- a/components/client_update_protocol/BUILD.gn
+++ b/components/link_header_util/BUILD.gn
@@ -2,28 +2,28 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-source_set("client_update_protocol") {
+static_library("link_header_util") {
   sources = [
-    "ecdsa.cc",
-    "ecdsa.h",
+    "link_header_util.cc",
+    "link_header_util.h",
   ]
 
   deps = [
     "//base",
-    "//crypto",
+    "//net",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
-    "ecdsa_unittest.cc",
+    "link_header_util_unittest.cc",
   ]
 
   deps = [
-    ":client_update_protocol",
+    ":link_header_util",
     "//base",
-    "//crypto",
+    "//net",
     "//testing/gtest",
   ]
 }