RTCCertificate and RTCPeerConnection.generateCertificate added to JavaScript

Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'Clock.cpp',
@@ skipping 738 matching lines @@
       'mediastream/MediaStreamCenter.h',
       'mediastream/MediaStreamComponent.cpp',
       'mediastream/MediaStreamComponent.h',
       'mediastream/MediaStreamDescriptor.cpp',
       'mediastream/MediaStreamDescriptor.h',
       'mediastream/MediaStreamSource.cpp',
       'mediastream/MediaStreamSource.h',
       'mediastream/MediaStreamTrackSourcesRequest.h',
       'mediastream/MediaStreamWebAudioSource.cpp',
       'mediastream/MediaStreamWebAudioSource.h',
+      'mediastream/RTCConfiguration.cpp',
       'mediastream/RTCConfiguration.h',
       'mediastream/RTCSessionDescriptionRequest.h',
       'mediastream/RTCStatsRequest.h',
       'mediastream/RTCStatsResponseBase.h',
       'mediastream/RTCVoidRequest.h',
       'mhtml/ArchiveResource.cpp',
       'mhtml/ArchiveResourceCollection.cpp',
       'mhtml/ArchiveResourceCollection.h',
       'mhtml/MHTMLArchive.cpp',
       'mhtml/MHTMLArchive.h',
@@ skipping 300 matching lines @@
       ['os_posix==1 and OS!="mac"',
         {
           'platform_test_files': [
             'text/LocaleICUTest.cpp',
           ],
         }
       ],
     ],
   },
 }