The SQLitePersistentCookieStore should use a non-partial index on iOS.

content/browser/net/sqlite_persistent_cookie_store.cc

Index: content/browser/net/sqlite_persistent_cookie_store.cc
diff --git a/content/browser/net/sqlite_persistent_cookie_store.cc b/content/browser/net/sqlite_persistent_cookie_store.cc
index 5da609bb67f72da1a964f60e0c6f67c8d5b41b74..07c340fff1b4071c0197b79852b0fb0a93b1f1fe 100644
--- a/content/browser/net/sqlite_persistent_cookie_store.cc
+++ b/content/browser/net/sqlite_persistent_cookie_store.cc
@@ -432,9 +432,13 @@ bool InitTable(sql::Connection* db) {
   if (!db->Execute("CREATE INDEX domain ON cookies(host_key)"))
     return false;
 
+#if defined(OS_IOS)

[rohitrao (ping after 24h), 2015/04/24 17:36:29]

Is it worth adding a comment saying why iOS is different, and which iOS version
is the first to support partial indexes?  (Put the comment in both places, if
you add it?)

[erikchen, 2015/04/24 17:42:57]

Done.

+  if (!db->Execute("CREATE INDEX is_transient ON cookies(persistent)")) {
+#else
   if (!db->Execute(
           "CREATE INDEX is_transient ON cookies(persistent) "
           "where persistent != 1")) {
+#endif
     return false;
   }
 
@@ -981,9 +985,14 @@ bool SQLitePersistentCookieStore::Backend::EnsureDatabaseVersion() {
       return false;
     }
 
+#if defined(OS_IOS)
+    if (!db_->Execute(
+        "CREATE INDEX IF NOT EXISTS is_transient ON cookies(persistent) ")) {

[rohitrao (ping after 24h), 2015/04/24 17:36:29]

Extra trailing whitespace in the SQL command.

[erikchen, 2015/04/24 17:42:57]

Done.

+#else
     if (!db_->Execute(
-            "CREATE INDEX IF NOT EXISTS is_transient ON cookies(persistent) "
-            "where persistent != 1")) {
+        "CREATE INDEX IF NOT EXISTS is_transient ON cookies(persistent) "
+        "where persistent != 1")) {
+#endif
       LOG(WARNING)
           << "Unable to create index is_transient in update to version 9.";
       return false;