[sql] Import reference version of SQLite 3.10.2.

third_party/sqlite/sqlite-src-3100200/src/os_common.h

 /*
 ** 2004 May 22
 **
 ** The author disclaims copyright to this source code.  In place of
 ** a legal notice, here is a blessing:
 **
 **    May you do good and not evil.
 **    May you find forgiveness for yourself and forgive others.
 **    May you share freely, never taking more than you give.
 **
@@ skipping 11 matching lines @@
 
 /*
 ** At least two bugs have slipped in because we changed the MEMORY_DEBUG
 ** macro to SQLITE_DEBUG and some older makefiles have not yet made the
 ** switch.  The following code should catch this problem at compile-time.
 */
 #ifdef MEMORY_DEBUG
 # error "The MEMORY_DEBUG macro is obsolete.  Use SQLITE_DEBUG instead."
 #endif
 
-#if defined(SQLITE_TEST) && defined(SQLITE_DEBUG)
-# ifndef SQLITE_DEBUG_OS_TRACE
-#   define SQLITE_DEBUG_OS_TRACE 0
-# endif
-  int sqlite3OSTrace = SQLITE_DEBUG_OS_TRACE;
-# define OSTRACE(X)          if( sqlite3OSTrace ) sqlite3DebugPrintf X
-#else
-# define OSTRACE(X)
-#endif
-
 /*
 ** Macros for performance tracing.  Normally turned off.  Only works
 ** on i486 hardware.
 */
 #ifdef SQLITE_PERFORMANCE_TRACE
 
 /* 
 ** hwtime.h contains inline assembler code for implementing 
 ** high-performance timing routines.
 */
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 ** When testing, keep a count of the number of open files.
 */
 #ifdef SQLITE_TEST
 int sqlite3_open_file_count = 0;
 #define OpenCounter(X)  sqlite3_open_file_count+=(X)
 #else
 #define OpenCounter(X)
 #endif
 
 #endif /* !defined(_OS_COMMON_H_) */