[sql] Enable HAVE_USLEEP for more platforms.

third_party/sqlite/sqlite.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'use_system_sqlite%': 0,
     'required_sqlite_version': '3.6.1',
   },
   'target_defaults': {
@@ skipping 15 matching lines @@
         [ 'chromeos==1' , {
             'defines': [
                 # Despite obvious warnings about not using this flag
                 # in deployment, we are turning off sync in ChromeOS
                 # and relying on the underlying journaling filesystem
                 # to do error recovery properly.  It's much faster.
                 'SQLITE_NO_SYNC',
                 ],
           },
         ],
+        ['os_posix == 1', {
+          'defines': [
+            # Allow xSleep() call on Unix to use usleep() rather than sleep().
+            # Microsecond precision is better than second precision.  Should
+            # only affect contended databases via the busy callback.  Browser
+            # profile databases are mostly exclusive, but renderer databases may
+            # allow for contention.
+            'HAVE_USLEEP=1',
+          ],
+        }],
         ['use_system_sqlite', {
           'type': 'none',
           'direct_dependent_settings': {
             'defines': [
               'USE_SYSTEM_SQLITE',
             ],
           },
 
           'conditions': [
             ['OS == "ios"', {
@@ skipping 79 matching lines @@
             }],
             ['OS == "mac" or OS == "ios"', {
               'link_settings': {
                 'libraries': [
                   '$(SDKROOT)/System/Library/Frameworks/CoreFoundation.framework',
                 ],
               },
             }],
             ['OS == "android"', {
               'defines': [
-                'HAVE_USLEEP=1',
                 'SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT=1048576',
                 'SQLITE_DEFAULT_AUTOVACUUM=1',
                 'SQLITE_TEMP_STORE=3',
                 'SQLITE_ENABLE_FTS3_BACKWARDS',
                 'SQLITE_DEFAULT_FILE_FORMAT=4',
               ],
             }],
             ['os_posix == 1 and OS != "mac" and OS != "android"', {
               'cflags': [
                 # SQLite doesn't believe in compiler warnings,
@@ skipping 70 matching lines @@
             '../icu/icu.gyp:icuuc',
           ],
           'sources': [
             'src/ext/icu/icu.c',
           ],
         },
       ],
     }],
   ],
 }