Fix nocompile test failure due to clang roll and re-enable

build/nocompile.gni

 # Copyright (c) 2011 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.
 
 # This file is meant to be included into an target to create a unittest that
 # invokes a set of no-compile tests.  A no-compile test is a test that asserts
 # a particular construct will not compile.
 #
 # Also see:
 #   http://dev.chromium.org/developers/testing/no-compile-tests
@@ skipping 41 matching lines @@
 # compiler and generates a .cc file that is empty on success, or will have a
 # series of #error lines on failure, and a set of trivially passing gunit
 # TEST() functions on success. This allows us to fail at the compile step when
 # something goes wrong, and know during the unittest run that the test was at
 # least processed when things go right.
 
 import("//testing/test.gni")
 
 declare_args() {
   # TODO(crbug.com/105388): make sure no-compile test is not flaky.
-  # TODO(crbug.com/695991): reenable if
-  #     is_linux && is_clang && host_cpu == target_cpu
-  enable_nocompile_tests = false
+  enable_nocompile_tests = is_linux && is_clang && host_cpu == target_cpu
 }
 
 if (enable_nocompile_tests) {
   import("//build/config/sysroot.gni")
   template("nocompile_test") {
     nocompile_target = target_name + "_run_nocompile"
 
     action_foreach(nocompile_target) {
       script = "//tools/nocompile_driver.py"
       sources = invoker.sources
@@ skipping 15 matching lines @@
         rebase_path(result_path, root_build_dir),
       ]
     }
 
     test(target_name) {
       deps = invoker.deps + [ ":$nocompile_target" ]
       sources = get_target_outputs(":$nocompile_target")
     }
   }
 }