https://bugs.webkit.org/show_bug.cgi?id=124085

Reviewed by Sam Weinig.

Source/WebCore:

* history/HistoryItem.cpp:
(WebCore::HistoryItem::encodeBackForwardTree):
Encode the root object.

(WebCore::HistoryItem::encodeBackForwardTreeNode):
Encode the target.

* history/HistoryItem.h:
Add new members.

* platform/KeyedCoding.h:
(WebCore::KeyedEncoder::encodeObject):
Call beginObject, call the functor and then call endObject().

Source/WebKit2:

Add a dictionary stack to KeyedEncoder that's pushed and popped by
beginObject/endObject.

* Shared/cf/KeyedEncoder.cpp:
(WebKit::KeyedEncoder::KeyedEncoder):
(WebKit::KeyedEncoder::~KeyedEncoder):
(WebKit::KeyedEncoder::encodeUInt32):
(WebKit::KeyedEncoder::encodeString):
(WebKit::KeyedEncoder::beginObject):
(WebKit::KeyedEncoder::endObject):
* Shared/cf/KeyedEncoder.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@158978 268f45cc-cd09-0410-ab3c-d52691b4dbfc