Remove duplicated headers from modules/

Source/modules/webdatabase/DatabaseTracker.cpp

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 28 matching lines @@
 #include "modules/webdatabase/DatabaseObserver.h"
 #include "modules/webdatabase/QuotaTracker.h"
 #include "modules/webdatabase/sqlite/SQLiteFileSystem.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebPlatformDatabaseObserver.h"
 #include "weborigin/DatabaseIdentifier.h"
 #include "weborigin/SecurityOrigin.h"
 #include "weborigin/SecurityOriginHash.h"
 #include "wtf/Assertions.h"
 #include "wtf/StdLibExtras.h"
-#include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 static void databaseClosed(DatabaseBackendBase* database)
 {
     if (blink::Platform::current()->databaseObserver()) {
         blink::Platform::current()->databaseObserver()->databaseClosed(
             createDatabaseIdentifierFromSecurityOrigin(database->securityOrigin()),
             database->stringIdentifier());
     } else {
@@ skipping 232 matching lines @@
         DatabaseSet::iterator found = databaseSet->find(database);
         if (found == databaseSet->end())
             return;
     }
 
     // And we have to call closeImmediately() without our collection lock being held.
     database->closeImmediately();
 }
 
 }