RTCCertificate and RTCPeerConnection.generateCertificate added to JavaScript

public/platform/WebRTCCertificateGenerator.h

Index: public/platform/WebRTCCertificateGenerator.h
diff --git a/public/platform/WebImageGenerator.h b/public/platform/WebRTCCertificateGenerator.h
similarity index 66%
copy from public/platform/WebImageGenerator.h
copy to public/platform/WebRTCCertificateGenerator.h
index bb17f4d6df96a2dcc73efa069d2c6646a2338ab9..1466f76319dee76513363ecb06f0ab6ba721f3c2 100644
--- a/public/platform/WebImageGenerator.h
+++ b/public/platform/WebRTCCertificateGenerator.h
@@ -28,21 +28,30 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef WebImageGenerator_h
-#define WebImageGenerator_h
+#ifndef WebRTCCertificateGenerator_h
+#define WebRTCCertificateGenerator_h
 
-#include "WebCommon.h"
-
-class SkData;
-class SkImageGenerator;
+#include "public/platform/WebCallbacks.h"
+#include "public/platform/WebRTCCertificate.h"
+#include "public/platform/WebRTCKeyType.h"
+#include "public/platform/WebURL.h"
 
 namespace blink {
 
-class BLINK_EXPORT WebImageGenerator {
+// Interface defining a class that can generate WebRTCCertificates asynchronously.
+class WebRTCCertificateGenerator {
 public:
-    static SkImageGenerator* create(SkData*);
+    virtual ~WebRTCCertificateGenerator() {}
+
+    // Start generating a certificate asynchronously. Which thread invokes the
+    // |observer| when the operation completes is implementation-specific.
+    virtual void generateCertificate(
+        const WebRTCKeyType&,
+        const WebURL& /*url*/,
+        const WebURL& /*firstPartyForCookies*/,
+        WebCallbacks<WebRTCCertificate*, void>* observer) = 0;
 };
 
 } // namespace blink
 
-#endif
+#endif // WebRTCCertificateGenerator_h