https://bugs.webkit.org/show_bug.cgi?id=127012

Reviewed by Anders Carlsson.

Source/WebCore:

Add basic KeyedDecoder interface that is the inverse of KeyedEncoder:
* platform/KeyedCoding.h:
(WebCore::KeyedDecoder::decodeVerifiedEnum):
(WebCore::KeyedDecoder::decodeObject):
(WebCore::KeyedDecoder::decodeObjects):

Use KeyedEncoder/Decoder to encode/decode IDBKeyPath:
* Modules/indexeddb/IDBKeyPath.cpp:
(WebCore::IDBKeyPath::encode):
(WebCore::IDBKeyPath::decode):
* Modules/indexeddb/IDBKeyPath.h:

* WebCore.exp.in:

Source/WebKit2:

Add a way to get the encoded buffer to save:
* Shared/cf/KeyedEncoder.cpp:
(WebKit::KeyedEncoder::finishEncoding):
* Shared/cf/KeyedEncoder.h:

Add a WebKit KeyedDecoder for CF platforms that can decode the previously encoded buffer:
* Shared/cf/KeyedDecoder.cpp: Added.
(WebKit::KeyedDecoder::KeyedDecoder):
(WebKit::KeyedDecoder::~KeyedDecoder):
(WebKit::KeyedDecoder::decodeInt64):
(WebKit::KeyedDecoder::decodeUInt32):
(WebKit::KeyedDecoder::decodeString):
(WebKit::KeyedDecoder::beginObject):
(WebKit::KeyedDecoder::endObject):
(WebKit::KeyedDecoder::beginArray):
(WebKit::KeyedDecoder::beginArrayElement):
(WebKit::KeyedDecoder::endArrayElement):
(WebKit::KeyedDecoder::endArray):
* Shared/cf/KeyedDecoder.h:

Create a WebKit KeyedEncoder/Decoder and use to encode/decode IDBKeyPaths:
* DatabaseProcess/IndexedDB/IDBSerialization.cpp:
(WebKit::serializeIDBKeyPath):
(WebKit::deserializeIDBKeyPath):
* DatabaseProcess/IndexedDB/IDBSerialization.h:

* DatabaseProcess/IndexedDB/sqlite/UniqueIDBDatabaseBackingStoreSQLite.cpp:
(WebKit::UniqueIDBDatabaseBackingStoreSQLite::createObjectStore):

* WebKit2.xcodeproj/project.pbxproj:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@162148 268f45cc-cd09-0410-ab3c-d52691b4dbfc