Add command to run earlgrey tests upstream.

scripts/slave/ios/test_runner.py

Index: scripts/slave/ios/test_runner.py
diff --git a/scripts/slave/ios/test_runner.py b/scripts/slave/ios/test_runner.py
index 8952d2daaca2237e44f22104a5edeedb8fcad557..a5a76452adfd8beee27fe3b1ef35eb9f5465ea4f 100755
--- a/scripts/slave/ios/test_runner.py
+++ b/scripts/slave/ios/test_runner.py
@@ -1275,13 +1275,28 @@ class SimulatorXCTestRunner(XCTestRunner):
     xctests_fullname = self.test_target_name + '.xctest'
     xctest_path = os.path.join(app_path, 'PlugIns', xctests_fullname)
 
-    cmd = [
-      os.path.join(built_dir, 'iossim'),
-      '-d', self.platform,
-      '-s', self.version,
-      app_path,
-      xctest_path
-    ]
+    if self.xcode_version == '8.0':

[baxley, 2016/08/15 18:17:34]

How long do we expect this to be in place?

If the old code goes away when Xcode 8 is GM and installed everywhere, then I
think there should be a bug tracking that we remove the old code.

If this will be long lived to always support both versions, should we change the
condition to be > 8.0?

[smut, 2016/08/15 18:57:52]

Ideally we should remove it when Xcode 8 is used by all the bots because they'll
never go back to not-Xcode 8, but we haven't always done that in practice. I
think there is still an instance of explicit Xcode 5 support somewhere in this
file.

+      cmd = [
+        os.path.join(built_dir, 'iossim'),
+        '-d', self.platform,
+        '-s', self.version,
+        app_path,
+        xctest_path
+      ]
+    else:
+      cmd = [
+        'xcodebuild', 'test-without-building',
+        'BUILT_PRODUCTS_DIR=%s' % built_dir,
+        '-project', self.test_project_dir,
+        '-scheme','TestProject',
+        '-destination','platform=iOS Simulator,name=%s,OS=%s'
+        % (self.platform, self.version),
+        '-archivePath', self.homedir,
+        'APP_TARGET_NAME=%s' % self.test_host_name,
+        'TEST_TARGET_NAME=%s' % self.test_target_name,
+        'NSUnbufferedIO=YES'
+      ]
+
     return cmd
 
   @TestRunner.RequireTearDown