Remove unused includes from core/inspector, core/loader and core/page

Source/core/page/PageGroup.h

 /*
  * Copyright (C) 2008 Apple 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * 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. 
  */
 
 #ifndef PageGroup_h
 #define PageGroup_h
 
 #include "core/page/UserStyleSheet.h"
 #include "core/platform/Supplementable.h"
-#include <wtf/HashSet.h>
-#include <wtf/Noncopyable.h>
-#include <wtf/PassRefPtr.h>
-#include <wtf/RefCounted.h>
-#include <wtf/text/StringHash.h>
+#include "wtf/HashSet.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefCounted.h"
 
 namespace WebCore {
 
     class KURL;
     class Page;
     class SecurityOrigin;
 
     class PageGroup : public Supplementable<PageGroup>, public RefCounted<PageGroup> {
         WTF_MAKE_NONCOPYABLE(PageGroup); WTF_MAKE_FAST_ALLOCATED;
     public:
@@ skipping 23 matching lines @@
 
         void invalidatedInjectedStyleSheetCacheInAllFrames();
 
         HashSet<Page*> m_pages;
         UserStyleSheetVector m_userStyleSheets;
     };
 
 } // namespace WebCore
     
 #endif // PageGroup_h