Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/modules/webdatabase/SQLTransactionBackend.cpp

 /*
  * Copyright (C) 2007, 2008, 2013 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
@@ skipping 209 matching lines @@
 // backend, the state function for Idle is unreachableState().
 //
 // The states that send a request to their peer across the front/back boundary
 // are implemented with just 2 functions: SQLTransaction::sendToBackendState()
 // and SQLTransactionBackend::sendToFrontendState(). These state functions do
 // nothing but sends a request to the other side to transit to the current
 // state (indicated by m_nextState), and then transits itself to the Idle state
 // to wait for further action.
 
 
-// The Life-Cycle of a SQLTransaction i.e. Who's keeping the SQLTransaction alive? 
+// The Life-Cycle of a SQLTransaction i.e. Who's keeping the SQLTransaction alive?
 // ==============================================================================
 // The RefPtr chain goes something like this:
 //
 //     At birth (in DatabaseBackend::runTransaction()):
 //     ====================================================
 //     DatabaseBackend                    // Deque<RefPtr<SQLTransactionBackend> > m_transactionQueue points to ...
 //     --> SQLTransactionBackend          // RefPtr<SQLTransaction> m_frontend points to ...
 //         --> SQLTransaction             // RefPtr<SQLTransactionBackend> m_backend points to ...
 //             --> SQLTransactionBackend  // which is a circular reference.
 //
@@ skipping 56 matching lines @@
 //     SQLTransactionBackend life-cycle. These are the phases and how the clean
 //     up is done:
 //
 //     Phase 1. After Birth, before scheduling
 //
 //     - To clean up, DatabaseThread::databaseThread() will call
 //       DatabaseBackend::close() during its shutdown.
 //     - DatabaseBackend::close() will iterate
 //       DatabaseBackend::m_transactionQueue and call
 //       notifyDatabaseThreadIsShuttingDown() on each transaction there.
-//        
+//
 //     Phase 2. After scheduling, before state AcquireLock
 //
 //     - If the interruption occures before the DatabaseTransactionTask is
 //       scheduled in DatabaseThread::m_queue but hasn't gotten to execute
 //       (i.e. DatabaseTransactionTask::performTask() has not been called),
 //       then the DatabaseTransactionTask may get destructed before it ever
 //       gets to execute.
 //     - To clean up, the destructor will check if the task's m_wasExecuted is
 //       set. If not, it will call notifyDatabaseThreadIsShuttingDown() on
 //       the task's transaction.
@@ skipping 511 matching lines @@
 }
 
 SQLTransactionState SQLTransactionBackend::sendToFrontendState()
 {
     ASSERT(m_nextState != SQLTransactionState::Idle);
     m_frontend->requestTransitToState(m_nextState);
     return SQLTransactionState::Idle;
 }
 
 } // namespace WebCore