MediaStream API: Update getUserMedia to match the spec

Source/modules/mediastream/UserMediaRequest.cpp

 /*
  * Copyright (C) 2011 Ericsson AB. All rights reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 16 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "modules/mediastream/UserMediaRequest.h"
 
 #include "bindings/v8/Dictionary.h"
+#include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/ExceptionState.h"
 #include "core/dom/Document.h"
+#include "core/dom/ExceptionCode.h"
 #include "core/dom/SpaceSplitString.h"
 #include "modules/mediastream/MediaConstraintsImpl.h"
 #include "modules/mediastream/MediaStream.h"
 #include "modules/mediastream/UserMediaController.h"
 #include "platform/mediastream/MediaStreamCenter.h"
 #include "platform/mediastream/MediaStreamDescriptor.h"
 
 namespace WebCore {
 
 static blink::WebMediaConstraints parseOptions(const Dictionary& options, const String& mediaType, ExceptionState& exceptionState)
@@ skipping 17 matching lines @@
 PassRefPtr<UserMediaRequest> UserMediaRequest::create(ExecutionContext* context, UserMediaController* controller, const Dictionary& options, PassOwnPtr<NavigatorUserMediaSuccessCallback> successCallback, PassOwnPtr<NavigatorUserMediaErrorCallback> errorCallback, ExceptionState& exceptionState)
 {
     blink::WebMediaConstraints audio = parseOptions(options, "audio", exceptionState);
     if (exceptionState.hadException())
         return nullptr;
 
     blink::WebMediaConstraints video = parseOptions(options, "video", exceptionState);
     if (exceptionState.hadException())
         return nullptr;
 
-    if (audio.isNull() && video.isNull())
+    if (audio.isNull() && video.isNull()) {
+        exceptionState.throwDOMException(SyntaxError, "At least one of audio and video must be requested");
         return nullptr;
+    }
 
     return adoptRef(new UserMediaRequest(context, controller, audio, video, successCallback, errorCallback));
 }
 
 UserMediaRequest::UserMediaRequest(ExecutionContext* context, UserMediaController* controller, blink::WebMediaConstraints audio, blink::WebMediaConstraints video, PassOwnPtr<NavigatorUserMediaSuccessCallback> successCallback, PassOwnPtr<NavigatorUserMediaErrorCallback> errorCallback)
     : ContextLifecycleObserver(context)
     , m_audio(audio)
     , m_video(video)
     , m_controller(controller)
     , m_successCallback(successCallback)
@@ skipping 58 matching lines @@
     }
 
     m_successCallback->handleEvent(stream.get());
 }
 
 void UserMediaRequest::fail(const String& description)
 {
     if (!executionContext())
         return;
 
-    if (m_errorCallback) {
-        RefPtr<NavigatorUserMediaError> error = NavigatorUserMediaError::create(NavigatorUserMediaError::NamePermissionDenied, description, String());
-        m_errorCallback->handleEvent(error.get());
-    }
+    RefPtr<NavigatorUserMediaError> error = NavigatorUserMediaError::create(NavigatorUserMediaError::NamePermissionDenied, description, String());
+    m_errorCallback->handleEvent(error.get());
 }
 
 void UserMediaRequest::failConstraint(const String& constraintName, const String& description)
 {
     ASSERT(!constraintName.isEmpty());
     if (!executionContext())
         return;
 
-    if (m_errorCallback) {
-        RefPtr<NavigatorUserMediaError> error = NavigatorUserMediaError::create(NavigatorUserMediaError::NameConstraintNotSatisfied, description, constraintName);
-        m_errorCallback->handleEvent(error.get());
-    }
+    RefPtr<NavigatorUserMediaError> error = NavigatorUserMediaError::create(NavigatorUserMediaError::NameConstraintNotSatisfied, description, constraintName);
+    m_errorCallback->handleEvent(error.get());
 }
 
 void UserMediaRequest::contextDestroyed()
 {
     RefPtr<UserMediaRequest> protect(this);
 
     if (m_controller) {
         m_controller->cancelUserMediaRequest(this);
         m_controller = 0;
     }
 
     ContextLifecycleObserver::contextDestroyed();
 }
 
 } // namespace WebCore