Disable map in Work Chrome

third_party/sqlite/BUILD.gn

 # Copyright (c) 2013 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.
 
 declare_args() {
   # Controls whether the build should uses the version of sqlite3 library
   # shipped with the system (currently only supported on iOS) or the one
   # shipped with Chromium source.
   use_system_sqlite = is_ios
 }
@@ skipping 50 matching lines @@
       # TODO(shess): SQLite adds mutexes to protect structures which cross
       # threads.  In theory Chromium should be able to turn this off for a
       # slight speed boost.
       "THREADSAFE",
 
       # SQLite can spawn threads to sort in parallel if configured
       # appropriately.  Chromium doesn't configure SQLite for that, and would
       # prefer to control distribution to worker threads.
       "SQLITE_MAX_WORKER_THREADS=0",
 
-      # 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",
 
       # 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
@@ skipping 62 matching lines @@
     } else if (is_android) {
       defines += [
         "SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT=1048576",
         "SQLITE_DEFAULT_AUTOVACUUM=1",
         "SQLITE_TEMP_STORE=3",
         "SQLITE_ENABLE_FTS3_BACKWARDS",
         "DSQLITE_DEFAULT_FILE_FORMAT=4",
       ]
     }
 
+    if (defined(android_channel) && android_channel == "work") {
+      defines += [
+        "SQLITE_MAX_MMAP_SIZE=0",
+      ]
+    } else {
+      defines += [
+        # 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",
+      ]
+    }
     deps = [
       "//third_party/icu",
     ]
   }
 
   config("sqlite_export") {
     if (is_component_build && is_win) {
       defines = [ "SQLITE_API=__declspec(dllimport)" ]
     }
   }
@@ skipping 67 matching lines @@
         "//third_party/icu",
       ]
       if (is_clang) {
         # src/ext/icu/icu.c uses assert(!"string") which causes warnings about
         # conversion from string literal to bool.
         configs -= [ "//build/config/clang:extra_warnings" ]
       }
     }
   }
 }