Remove worker support of Web SQL Database.

public/web/WebDatabase.h

 /*
  * Copyright (C) 2009 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 27 matching lines @@
 
 class DatabaseBackendBase;
 class WebString;
 
 class WebDatabase {
 public:
     BLINK_EXPORT WebString name() const;
     BLINK_EXPORT WebString displayName() const;
     BLINK_EXPORT unsigned long estimatedSize() const;
     BLINK_EXPORT WebSecurityOrigin securityOrigin() const;
+    // Deprecated: This always returns false.
     BLINK_EXPORT bool isSyncDatabase() const;
 
     BLINK_EXPORT static void updateDatabaseSize(
         const WebString& originIdentifier, const WebString& name, long long size);
     BLINK_EXPORT static void updateSpaceAvailable(
         const WebString& originIdentifier, long long spaceAvailable);
     BLINK_EXPORT static void resetSpaceAvailable(
         const WebString& originIdentifier);
 
     BLINK_EXPORT static void closeDatabaseImmediately(
         const WebString& originIdentifier, const WebString& databaseName);
 
 #if BLINK_IMPLEMENTATION
     WebDatabase(const DatabaseBackendBase*);
 #endif
 
 private:
     WebDatabase() { }
     const DatabaseBackendBase* m_database;
 };
 
 } // namespace blink
 
 #endif