Ensures that modules_unittests runs on iOS

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

Index: webrtc/modules/audio_coding/main/acm2/audio_coding_module_unittest_oldapi.cc
diff --git a/webrtc/modules/audio_coding/main/acm2/audio_coding_module_unittest_oldapi.cc b/webrtc/modules/audio_coding/main/acm2/audio_coding_module_unittest_oldapi.cc
index 929439ff7731f384e473563254aa6454fce70d68..d97f4e65b35db3049cac1c30466a4041bd0d1d4b 100644
--- a/webrtc/modules/audio_coding/main/acm2/audio_coding_module_unittest_oldapi.cc
+++ b/webrtc/modules/audio_coding/main/acm2/audio_coding_module_unittest_oldapi.cc
@@ -595,7 +595,7 @@ class AudioCodingModuleMtTestOldApi : public AudioCodingModuleTestOldApi {
   rtc::scoped_ptr<SimulatedClock> fake_clock_;
 };
 
-TEST_F(AudioCodingModuleMtTestOldApi, DoTest) {
+TEST_F(AudioCodingModuleMtTestOldApi, DISABLED_ON_IOS(DoTest)) {
   EXPECT_EQ(kEventSignaled, RunTest());
 }
 
@@ -695,10 +695,14 @@ class AcmIsacMtTestOldApi : public AudioCodingModuleMtTestOldApi {
   test::AudioLoop audio_loop_;
 };
 
-TEST_F(AcmIsacMtTestOldApi, DoTest) {
+TEST_F(AcmIsacMtTestOldApi, DISABLED_ON_IOS(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 AcmReceiverBitExactnessOldApi : public ::testing::Test {
  public:
   static std::string PlatformChecksum(std::string win64,
@@ -1524,4 +1528,7 @@ TEST_F(AcmSwitchingOutputFrequencyOldApi, Toggle16KhzTo8Khz) {
 TEST_F(AcmSwitchingOutputFrequencyOldApi, Toggle8KhzTo16Khz) {
   Run(8000, 16000, 1000);
 }
+
+#endif
+
 }  // namespace webrtc