Add tools for code coverage support in iOS.

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();
+// In debug builds, if IOS_ENABLE_COVERAGE is defined, sets the filename of the
+// coverage file. Otherwise, it does nothing.
+void ConfigureCoverageReportPath();
 
 }  // namespace coverage_util
 
 #endif  // TESTING_COVERAGE_UTIL_IOS_H_