Chromium side patch for DB support on Linux.

third_party/sqlite/src/os_unix.c

 /*
 ** 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 2063 matching lines @@
 }
 
 /*
 ** Return the device characteristics for the file. This is always 0.
 */
 static int unixDeviceCharacteristics(sqlite3_file *id){
   return 0;
 }
 
 /*
+** Initializes a unixFile structure with zeros.
+*/
+void initUnixFile(sqlite3_file* file) {
+  memset(file, 0, sizeof(unixFile));
+}
+
+/*
 ** Initialize the contents of the unixFile structure pointed to by pId.
 **
 ** When locking extensions are enabled, the filepath and locking style 
 ** are needed to determine the unixFile pMethod to use for locking operations.
 ** The locking-style specific lockingContext data structure is created 
 ** and assigned here also.
 */
-static int fillInUnixFile(
+int fillInUnixFile(
   sqlite3_vfs *pVfs,      /* Pointer to vfs object */
   int h,                  /* Open file descriptor of file being opened */
   int dirfd,              /* Directory file descriptor */
   sqlite3_file *pId,      /* Write to the unixFile structure here */
   const char *zFilename,  /* Name of the file being opened */
   int noLock              /* Omit locking if true */
 ){
   int eLockingStyle;
   unixFile *pNew = (unixFile *)pId;
   int rc = SQLITE_OK;
@@ skipping 639 matching lines @@
 }
 
 /*
 ** Shutdown the operating system interface. This is a no-op for unix.
 */
 int sqlite3_os_end(void){ 
   return SQLITE_OK; 
 }
  
 #endif /* SQLITE_OS_UNIX */