Disable some filesystem tests that don't make sense on iOS.

webrtc/test/testsupport/fileutils_unittest.cc

Index: webrtc/test/testsupport/fileutils_unittest.cc
diff --git a/webrtc/test/testsupport/fileutils_unittest.cc b/webrtc/test/testsupport/fileutils_unittest.cc
index 5e36c35f77cc5732196dc8f2b5b5737f0fa0d8af..f7ddb1539bf40b643a1c5d070de598c3792ee669 100644
--- a/webrtc/test/testsupport/fileutils_unittest.cc
+++ b/webrtc/test/testsupport/fileutils_unittest.cc
@@ -58,7 +58,7 @@ std::string FileUtilsTest::original_working_dir_ = "";
 // directory that is automatically set when the test executable is launched.
 // The test is not fully testing the implementation, since we cannot be sure
 // of where the executable was launched from.
-#if defined(WEBRTC_ANDROID)
+#if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)
 #define MAYBE_OutputPathFromUnchangedWorkingDir \
   DISABLED_OutputPathFromUnchangedWorkingDir
 #else
@@ -74,7 +74,7 @@ TEST_F(FileUtilsTest, MAYBE_OutputPathFromUnchangedWorkingDir) {
 
 // Tests with current working directory set to a directory higher up in the
 // directory tree than the project root dir.
-#if defined(WEBRTC_ANDROID) || defined(WIN32)
+#if defined(WEBRTC_ANDROID) || defined(WIN32) || defined(WEBRTC_IOS)
 #define MAYBE_OutputPathFromRootWorkingDir DISABLED_OutputPathFromRootWorkingDir
 #else
 #define MAYBE_OutputPathFromRootWorkingDir OutputPathFromRootWorkingDir
@@ -93,7 +93,12 @@ TEST_F(FileUtilsTest, TempFilename) {
 }
 
 // Only tests that the code executes
-TEST_F(FileUtilsTest, CreateDir) {
+#if defined(WEBRTC_IOS)
+#define MAYBE_CreateDir DISABLED_CreateDir
+#else
+#define MAYBE_CreateDir CreateDir
+#endif
+TEST_F(FileUtilsTest, MAYBE_CreateDir) {
   std::string directory = "fileutils-unittest-empty-dir";
   // Make sure it's removed if a previous test has failed:
   remove(directory.c_str());
@@ -121,7 +126,9 @@ TEST_F(FileUtilsTest, ResourcePathReturnsValue) {
 TEST_F(FileUtilsTest, ResourcePathFromRootWorkingDir) {
   ASSERT_EQ(0, chdir(kPathDelimiter));
   std::string resource = webrtc::test::ResourcePath(kTestName, kExtension);
+#if !defined(WEBRTC_IOS)
   ASSERT_NE(resource.find("resources"), std::string::npos);
+#endif
   ASSERT_GT(resource.find(kTestName), 0u);
   ASSERT_GT(resource.find(kExtension), 0u);
 }