Disable map in Work Chrome

third_party/sqlite/BUILD.gn

Index: third_party/sqlite/BUILD.gn
diff --git a/third_party/sqlite/BUILD.gn b/third_party/sqlite/BUILD.gn
index 395bfa5750f68f323ef952d7792cb591e68c7e22..a7cb64e591af4d1431fd812bd3d14c9939ab3bc9 100644
--- a/third_party/sqlite/BUILD.gn
+++ b/third_party/sqlite/BUILD.gn
@@ -68,13 +68,6 @@ if (!use_system_sqlite) {
       # 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.
@@ -157,6 +150,20 @@ if (!use_system_sqlite) {
       ]
     }
 
+    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",
     ]