Revert "Transition modules/** to use ExceptionState"

Source/modules/mediasource/WebKitMediaSource.h

Index: Source/modules/mediasource/WebKitMediaSource.h
diff --git a/Source/modules/mediasource/WebKitMediaSource.h b/Source/modules/mediasource/WebKitMediaSource.h
index 4dfd21519aeb8faff16231947d5976d4f0c48673..a46f21612f461ea182e2caeb7cebe69c54196f70 100644
--- a/Source/modules/mediasource/WebKitMediaSource.h
+++ b/Source/modules/mediasource/WebKitMediaSource.h
@@ -39,8 +39,6 @@
 
 namespace WebCore {
 
-class ExceptionState;
-
 class WebKitMediaSource : public MediaSourceBase, public ScriptWrappable {
 public:
     static PassRefPtr<WebKitMediaSource> create(ScriptExecutionContext*);
@@ -49,8 +47,8 @@ public:
     // WebKitMediaSource.idl methods
     WebKitSourceBufferList* sourceBuffers();
     WebKitSourceBufferList* activeSourceBuffers();
-    WebKitSourceBuffer* addSourceBuffer(const String& type, ExceptionState&);
-    void removeSourceBuffer(WebKitSourceBuffer*, ExceptionState&);
+    WebKitSourceBuffer* addSourceBuffer(const String& type, ExceptionCode&);
+    void removeSourceBuffer(WebKitSourceBuffer*, ExceptionCode&);
     static bool isTypeSupported(const String& type);
 
     // EventTarget interface