Ensures that modules_unittests runs on iOS

webrtc/modules/audio_coding/main/acm2/audio_coding_module_unittest.cc

 /*
  *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 485 matching lines @@
       }
     }
     return false;
   }
 
   int last_packet_number_;
   std::vector<uint8_t> last_payload_vec_;
   test::AudioLoop audio_loop_;
 };
 
-TEST_F(AcmIsacMtTest, DoTest) {
+#if defined(WEBRTC_IOS)
+// See https://code.google.com/p/webrtc/issues/detail?id=4752 for details.
+#define MAYBE_DoTest DISABLED_DoTest
+#else
+#define MAYBE_DoTest DoTest
+#endif
+TEST_F(AcmIsacMtTest, MAYBE_DoTest) {
   EXPECT_EQ(kEventSignaled, RunTest());
 }
 
+// Disabling all of these tests on iOS until file support has been added.
+// See https://code.google.com/p/webrtc/issues/detail?id=4752 for details.
+#if !defined(WEBRTC_IOS)
+
 class AcmReceiverBitExactness : public ::testing::Test {
  public:
   static std::string PlatformChecksum(std::string win64,
                                       std::string android,
                                       std::string others) {
 #if defined(_WIN32) && defined(WEBRTC_ARCH_64_BITS)
     return win64;
 #elif defined(WEBRTC_ANDROID)
     return android;
 #else
@@ skipping 436 matching lines @@
           "1e1a0fce893fef2d66886a7f09e2ebce",
           "855041f2490b887302bce9d544731849"),
       AcmReceiverBitExactness::PlatformChecksum(
           "d781cce1ab986b618d0da87226cdde30",
           "1a1fe04dd12e755949987c8d729fb3e0",
           "d781cce1ab986b618d0da87226cdde30"),
       50,
       test::AcmReceiveTest::kStereoOutput);
 }
 
+#endif
+
 }  // namespace webrtc