iOS: Add resource files for tests and implement OutputPath

webrtc/test/testsupport/fileutils.cc

Index: webrtc/test/testsupport/fileutils.cc
diff --git a/webrtc/test/testsupport/fileutils.cc b/webrtc/test/testsupport/fileutils.cc
index 4ff0034dea178de23fd21bd79da31e0963395d45..2fab425a3166430ca76a1d8fc98bdbd11ce3c147 100644
--- a/webrtc/test/testsupport/fileutils.cc
+++ b/webrtc/test/testsupport/fileutils.cc
@@ -43,6 +43,7 @@ namespace test {
 
 #if defined(WEBRTC_IOS)
 // Defined in iosfileutils.mm.  No header file to discourage use elsewhere.
+std::string IOSOutputPath();
 std::string IOSResourcePath(std::string name, std::string extension);
 #endif
 
@@ -59,9 +60,12 @@ const char* kRootDirName = "/sdcard/";
 #else
 // The file we're looking for to identify the project root dir.
 const char* kProjectRootFileName = "DEPS";
+#if !defined(WEBRTC_IOS)
 const char* kOutputDirName = "out";
-const char* kFallbackPath = "./";
 #endif
+const char* kFallbackPath = "./";
+#endif  // !defined(WEBRTC_ANDROID)
+
 #if !defined(WEBRTC_IOS)
 const char* kResourcesDirName = "resources";
 #endif
@@ -140,6 +144,9 @@ std::string ProjectRootPath() {
 }
 
 std::string OutputPath() {
+#if defined(WEBRTC_IOS)
+  return IOSOutputPath();
+#else
   std::string path = ProjectRootPath();
   if (path == kCannotFindProjectRootDir) {
     return kFallbackPath;
@@ -149,6 +156,7 @@ std::string OutputPath() {
     return kFallbackPath;
   }
   return path + kPathDelimiter;
+#endif
 }
 
 std::string WorkingDir() {