[sqlite] Remove WebDatabase externs and depend on what you use.

Source/modules/webdatabase/sqlite/SQLiteFileSystemPosix.cpp

 /*
  * 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 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+// Expose chromium_sqlite3_* functions from Chromium's patched SQLite.
+#define CHROMIUM_SQLITE_INTERNALS
+
 #include "config.h"
 #include "modules/webdatabase/sqlite/SQLiteFileSystem.h"
 
 #include <sqlite3.h>
 #include "public/platform/Platform.h"
 
 #include <fcntl.h>
 #include <string.h>
 #include <unistd.h>
 
-// Defined in Chromium's codebase in third_party/sqlite/src/os_unix.c
-extern "C" {
-void chromium_sqlite3_initialize_unix_sqlite3_file(sqlite3_file* file);
-int chromium_sqlite3_fill_in_unix_sqlite3_file(sqlite3_vfs* vfs, int fd, int dirfd, sqlite3_file* file, const char* fileName, int noLock);
-int chromium_sqlite3_get_reusable_file_handle(sqlite3_file* file, const char* fileName, int flags, int* fd);
-void chromium_sqlite3_update_reusable_file_handle(sqlite3_file* file, int fd, int flags);
-void chromium_sqlite3_destroy_reusable_file_handle(sqlite3_file* file);
-}
-
 namespace blink {
 
 // Chromium's Posix implementation of SQLite VFS
 namespace {
 
 struct chromiumVfsFile {
     sqlite3_io_methods* pMethods;
     sqlite3_file* wrappedFile;
     char* wrappedFileName;
 };
@@ skipping 290 matching lines @@
         chromiumDlClose,
         chromiumRandomness,
         chromiumSleep,
         chromiumCurrentTime,
         chromiumGetLastError
     };
     sqlite3_vfs_register(&chromium_vfs, 0);
 }
 
 } // namespace blink