Update from https://crrev.com/315085

testing/platform_test_ios.mm

Index: testing/platform_test_ios.mm
diff --git a/testing/platform_test_ios.mm b/testing/platform_test_ios.mm
deleted file mode 100644
index 5162c1dbb1153629b3c069c8f45df2633456a00b..0000000000000000000000000000000000000000
--- a/testing/platform_test_ios.mm
+++ /dev/null
@@ -1,18 +0,0 @@
-// 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.
-
-#include "platform_test.h"
-
-#import <Foundation/Foundation.h>
-
-#include "coverage_util_ios.h"
-
-PlatformTest::PlatformTest()
-    : pool_([[NSAutoreleasePool alloc] init]) {
-}
-
-PlatformTest::~PlatformTest() {
-  [pool_ release];
-  coverage_util::FlushCoverageDataIfNecessary();
-}