Add IndexedDBValue wrapper class to group blob info with bits.

content/browser/indexed_db/indexed_db_leveldb_coding.cc

Index: content/browser/indexed_db/indexed_db_leveldb_coding.cc
diff --git a/content/browser/indexed_db/indexed_db_leveldb_coding.cc b/content/browser/indexed_db/indexed_db_leveldb_coding.cc
index 23766030407ea4a71d8c52f4849dc02616bd1e93..694bf6ea2a70e795ebad2da1a7dad549416f0e96 100644
--- a/content/browser/indexed_db/indexed_db_leveldb_coding.cc
+++ b/content/browser/indexed_db/indexed_db_leveldb_coding.cc
@@ -1400,6 +1400,10 @@ bool DatabaseMetaDataKey::IsValidBlobKey(int64 blob_key) {
   return blob_key >= kBlobKeyGeneratorInitialNumber;
 }
 
+const int64 DatabaseMetaDataKey::kAllBlobsKey = 1;
+const int64 DatabaseMetaDataKey::kBlobKeyGeneratorInitialNumber = 2;
+const int64 DatabaseMetaDataKey::kInvalidBlobKey = -1;

[cmumford, 2014/03/14 00:36:16]

Don't we usually put constants at the top of the file?

[ericu, 2014/03/14 01:17:23]

In this file they go with their classes, so I was following that.
I don't see anything about class constants in the style guide; if they weren't
class-scoped, I'd agree, but I'm not sure we pull them up top for class members.

+
 std::string DatabaseMetaDataKey::Encode(int64 database_id,
                                         MetaDataType meta_data_type) {
   KeyPrefix prefix(database_id);