https://bugs.webkit.org/show_bug.cgi?id=114472

Reviewed by Beth Dakin.

Source/WebCore:

Export StorageMap::removeItem.

* WebCore.exp.in:

Source/WebKit2:

* UIProcess/Storage/StorageManager.cpp:
(StorageManager::StorageArea):
(WebKit::StorageManager::StorageArea::setItem):
Rename connection to sourceConnection.

(WebKit::StorageManager::StorageArea::removeItem):
Remove the item from the map and dispatch events if needed.

(WebKit::StorageManager::removeItem):
Find the right storage area, remove the item and send back a DidRemoveItem message.

* UIProcess/Storage/StorageManager.messages.in:
Add RemoveItem message.

* WebProcess/Storage/StorageAreaImpl.cpp:
(WebKit::StorageAreaImpl::removeItem):
Call StorageAreaMap::removeItem.

* WebProcess/Storage/StorageAreaMap.cpp:
(WebKit::StorageAreaMap::removeItem):
Send a RemoveItem message to the storage manager.

(WebKit::StorageAreaMap::didRemoveItem):
Add empty stub.

* WebProcess/Storage/StorageAreaMap.messages.in:
Add DidRemoveItem message.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148245 268f45cc-cd09-0410-ab3c-d52691b4dbfc