Flush gcda (code coverage) files manually in iOS Platform Test.

testing/coverage_util_ios.h

+// 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.
+
+#ifndef TESTING_COVERAGE_UTIL_IOS_H_
+#define TESTING_COVERAGE_UTIL_IOS_H_
+
+namespace coverage_util {
+
+// Flushes .gcda coverage files if ENABLE_TEST_CODE_COVERAGE is defined. iOS 7
+// does not call any code at the "end" of an app so flushing should be
+// performed manually.
+void FlushCoverageDataIfNecessary();
+
+}  // namespace coverage_util
+
+#endif  // TESTING_COVERAGE_UTIL_IOS_H_