WebRTC: Add gyp_script parameter to ios recipe module's run_mb call.

scripts/slave/recipes/webrtc/ios.py

Index: scripts/slave/recipes/webrtc/ios.py
diff --git a/scripts/slave/recipes/webrtc/ios.py b/scripts/slave/recipes/webrtc/ios.py
index 166fd3dd26200a5ae7a67db8ba0d5c987291d8cd..e92ed753b37a9a25936b45d803460ddd0439fe07 100644
--- a/scripts/slave/recipes/webrtc/ios.py
+++ b/scripts/slave/recipes/webrtc/ios.py
@@ -38,7 +38,12 @@ def RunSteps(api):
       'build',
       'mb_config.pyl',
   )
-  api.ios.build(mb_config_path=mb_config_path)
+  gyp_script = api.path['checkout'].join(
+      'webrtc',
+      'build',
+      'gyp_webrtc.py',
+  )
+  api.ios.build(mb_config_path=mb_config_path, gyp_script=gyp_script)
   api.ios.test()
 
 
@@ -121,6 +126,7 @@ def GenTests(api):
         'fake gyp define 2': 'fake value 2',
         'use_goma': '1',
       },
+      'mb_type': 'gyp',
       'compiler': 'ninja',
       'configuration': 'Release',
       'sdk': 'iphoneos8.0',
@@ -147,6 +153,7 @@ def GenTests(api):
         'use_goma': '1',
       },
       'use_analyze': 'false',
+      'mb_type': 'gyp',
       'compiler': 'ninja',
       'configuration': 'Release',
       'sdk': 'iphoneos8.0',
@@ -172,6 +179,7 @@ def GenTests(api):
         'fake gyp define 1': 'fake value 1',
         'fake gyp define 2': 'fake value 2',
       },
+      'mb_type': 'gyp',
       'compiler': 'xcodebuild',
       'configuration': 'Debug',
       'sdk': 'iphonesimulator8.0',
@@ -210,6 +218,7 @@ def GenTests(api):
         'fake gyp define 1': 'fake value 1',
         'fake gyp define 2': 'fake value 2',
       },
+      'mb_type': 'gyp',
       'compiler': 'ninja',
       'configuration': 'Debug',
       'sdk': 'iphonesimulator8.0',