Minimal Changes to run tests on iOS

tests/StreamTest.cpp

Index: tests/StreamTest.cpp
diff --git a/tests/StreamTest.cpp b/tests/StreamTest.cpp
index 7a89c99c0c1f91c470379ead3e8cdd27e96d2ceb..776c2010145e15579064fb2431ee0b35b4097e89 100644
--- a/tests/StreamTest.cpp
+++ b/tests/StreamTest.cpp
@@ -246,6 +246,10 @@ static void test_peeking_front_buffered_stream(skiatest::Reporter* r,
     test_peeking_stream(r, bufferedStream, bufferSize);
 }
 
+// This test uses file system operations that don't work out of the 
+// box on iOS. It's likely that we don't need them on iOS. Ignoring for now. 
+// TODO(stephana): Re-evaluate if we need this in the future. 
+#ifndef SK_BUILD_FOR_IOS
 DEF_TEST(StreamPeek, reporter) {
     // Test a memory stream.
     const char gAbcs[] = "abcdefghijklmnopqrstuvwxyz";
@@ -265,3 +269,4 @@ DEF_TEST(StreamPeek, reporter) {
         test_peeking_front_buffered_stream(reporter, memStream, i);
     }
 }
+#endif