Reduce the memory usage of bookmarks storage

components/bookmarks/browser/bookmark_codec.cc

Index: components/bookmarks/browser/bookmark_codec.cc
diff --git a/components/bookmarks/browser/bookmark_codec.cc b/components/bookmarks/browser/bookmark_codec.cc
index abbb1cd7b64289eceba9eff25a87872d786d9304..c71ce1785733c2b371cc686338c3ced6cc7edbb0 100644
--- a/components/bookmarks/browser/bookmark_codec.cc
+++ b/components/bookmarks/browser/bookmark_codec.cc
@@ -433,6 +433,14 @@ void BookmarkCodec::DecodeMetaInfoHelper(
     const std::string& prefix,
     BookmarkNode::MetaInfoMap* meta_info_map) {
   for (base::DictionaryValue::Iterator it(dict); !it.IsAtEnd(); it.Advance()) {
+    bool is_excluded = false;
+    for (const auto& excluded : excluded_meta_info_keys_) {

[sky, 2017/05/31 21:29:14]

Sorry if I wasn't clear. I'm suggesting you harcode the list of bogus values
here.

[ssid, 2017/05/31 21:44:52]

No problem. fixed it. Made it a single string. if we want more in future we can
make it a list.

+      if (it.key().find(excluded) != std::string::npos)

[sky, 2017/05/31 21:29:13]

You don't want a find, you want a starts with, right?

[ssid, 2017/05/31 21:44:52]

Done.

+        is_excluded = true;
+    }
+    if (is_excluded)
+      continue;
+
     if (it.value().IsType(base::Value::Type::DICTIONARY)) {
       const base::DictionaryValue* subdict;
       it.value().GetAsDictionary(&subdict);