build: Enable auto raw pointer deduction check on linux.

build/config/clang/BUILD.gn

 # Copyright (c) 2013 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.
 
 import("clang.gni")
 import("//build/config/chromecast_build.gni")
 
 config("find_bad_constructs") {
   if (clang_use_chrome_plugins) {
     cflags = []
@@ skipping 19 matching lines @@
       ]
     }
 
     cflags += [
       "-Xclang",
       "-add-plugin",
       "-Xclang",
       "find-bad-constructs",
     ]
 
+    # TODO(vmpstr): We need to enable this everywhere. crbug.com/554600
+    if (is_linux && !is_chromeos && !is_chromecast) {
+      cflags += [
+        "-Xclang",
+        "-plugin-arg-find-bad-constructs",
+        "-Xclang",
+        "check-auto-raw-pointer",
+      ]
+    }
+
     if ((is_linux || is_android) && !is_chromecast) {
       cflags += [
         "-Xclang",
         "-plugin-arg-find-bad-constructs",
         "-Xclang",
         "check-ipc",
       ]
     }
   }
 }
 
 # Enables some extra Clang-specific warnings. Some third-party code won't
 # compile with these so may want to remove this config.
 config("extra_warnings") {
   cflags = [
     "-Wheader-hygiene",
 
     # Warns when a const char[] is converted to bool.
     "-Wstring-conversion",
 
     "-Wtautological-overlap-compare",
   ]
 }