Fix MSVC workaround in basic_seconds_clock

src/ripple/module/app/main/Application.cpp

@@ -1021,7 +1021,7 @@ public:
             // VFALCO NOTE This is a sign that something is wrong somewhere, it
             //             shouldn't be necessary to sleep until some flag is set.
             while (mShutdown)
-                boost::this_thread::sleep (boost::posix_time::milliseconds (100));
+                std::this_thread::sleep_for (std::chrono::milliseconds (100));
         }
     }
 

src/ripple/module/app/main/LoadManager.cpp

@@ -17,6 +17,8 @@
 */
 //==============================================================================
 
+#include <boost/thread.hpp>
+
 namespace ripple {
 
 class LoadManagerImp

src/ripple/module/app/misc/Validations.cpp

@@ -17,6 +17,8 @@
 */
 //==============================================================================
 
+#include <thread>
+
 namespace ripple {
 
 class ValidationsImp;
@@ -406,7 +408,7 @@ private:
         while (mWriting)
         {
             ScopedUnlockType sul (mLock);
-            boost::this_thread::sleep (boost::posix_time::milliseconds (100));
+            std::this_thread::sleep_for (std::chrono::milliseconds (100));
         }
 
         WriteLog (lsDEBUG, Validations) << "Validations flushed";