Import SQLite 3.10.2.

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 20 matching lines @@
       # Allow 256MB mmap footprint per connection.  Should not be too open-ended
       # as that could cause memory fragmentation.  50MB encompasses the 99th
       # percentile of Chrome databases in the wild.
       # TODO(shess): A 64-bit-specific value could be 1G or more.
       # TODO(shess): Figure out if exceeding this is costly.
       'SQLITE_MAX_MMAP_SIZE=268435456',
       # Use a read-only memory map when mmap'ed I/O is enabled to prevent memory
       # stompers from directly corrupting the database.
       # TODO(shess): Upstream the ability to use this define.
       'SQLITE_MMAP_READ_ONLY=1',
+      # By default SQLite pre-allocates 100 pages of pcache data, which will not
+      # be released until the handle is closed.  This is contrary to Chromium's
+      # memory-usage goals.
+      'SQLITE_DEFAULT_PCACHE_INITSZ=0',
       # NOTE(shess): Some defines can affect the amalgamation.  Those should be
       # added to google_generate_amalgamation.sh, and the amalgamation
       # re-generated.  Usually this involves disabling features which include
       # keywords or syntax, for instance SQLITE_OMIT_VIRTUALTABLE omits the
       # virtual table syntax entirely.  Missing an item usually results in
       # syntax working but execution failing.  Review:
       #   src/src/parse.py
       #   src/tool/mkkeywordhash.c
     ],
   },
@@ skipping 202 matching lines @@
             'clang_warning_flags_unset': [
               # icu.c uses assert(!"foo") instead of assert(false && "foo")
               '-Wstring-conversion',
             ],
           },
         },
       ],
     }],
   ],
 }