Upstream //build/ios/coverage.gypi

Add OWNERS for build/ios.
Use Xcode clang compiler for coverage configuration.

BUG=450379

Review URL: https://codereview.chromium.org/853293002

Cr-Original-Commit-Position: refs/heads/master@{#312416}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 07a8e92fb99ff03230122c2341e2d3b017216757

common.gypi

@@ -2058,6 +2058,9 @@
         'grit_defines': ['-D', 'scale_factors=2x'],
       }],
       ['OS == "ios"', {
+        'variables': {
+          'enable_coverage%': 0,
+        },
         'grit_defines': [
           '-t', 'ios',
           # iOS uses a whitelist to filter resources.
@@ -2073,7 +2076,10 @@
 
           # TODO(sdefresne): Remove the target_subarch check once Apple has
           # upstreamed the support for "arm64". http://crbug.com/341453
-          ['target_subarch!="arm32" or "<(GENERATOR)"=="xcode"', {
+          # TODO(eugenebut): Remove enable_coverage check once
+          # libclang_rt.profile_ios.a is bundled with Chromium's clang.
+          # http://crbug.com/450379
+          ['target_subarch!="arm32" or enable_coverage or "<(GENERATOR)"=="xcode"', {
             'clang_xcode%': 1,
           }],
         ],

ios/OWNERS

@@ -0,0 +1,3 @@
+rohitrao@chromium.org
+stuartmorgan@chromium.org
+

ios/coverage.gypi

@@ -0,0 +1,33 @@
+# Copyright 2014 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.
+
+{
+  'variables': {
+    'chromium_code': 1,
+    'enable_coverage%': 0,
+  },
+  'conditions': [
+    ['OS=="ios" and enable_coverage', {
+        'target_defaults': {
+          'defines': [
+            'ENABLE_TEST_CODE_COVERAGE=1'
+          ],
+          'link_settings': {
+            'xcode_settings': {
+              'OTHER_LDFLAGS': [
+                '-fprofile-arcs',
+              ],
+            },
+          },
+          'xcode_settings': {
+            'OTHER_CFLAGS': [
+              '-fprofile-arcs',
+              '-ftest-coverage',
+            ],
+          },
+        },
+    }],
+  ],
+}
+