Add a fuzzer test for the Clear-Site-Data header.

content/test/fuzzer/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Fuzzers for content/ components.
 
 import("//testing/libfuzzer/fuzzer_test.gni")
 
 # Empty group for package discovery.
 group("fuzzer") {
@@ skipping 25 matching lines @@
   }
 
   fuzzer_test("renderer_tree_fuzzer") {
     sources = [
       "renderer_tree_fuzzer.cc",
     ]
     deps = [
       ":fuzzer_support",
     ]
   }
+
+  fuzzer_test("clear_site_data_fuzzer") {
+    sources = [
+      "clear_site_data_fuzzer.cc",
+    ]
+    deps = [
+      ":fuzzer_support",
+      "//base",
+      "//content/browser:for_content_tests",
+    ]
+    seed_corpus = "//content/test/data/fuzzer_corpus/clear_site_data/"
+  }
 }