https://bugs.webkit.org/show_bug.cgi?id=105838

Reviewed by Dan Bernstein.

This patch adds a NetworkProcessSupplement, which is almost identical to
WebProcessSupplement, but has a different initialization override. It also
stops WebProcessSupplement from inheriting from MessageReceiver (and makes
everything that is a WebProcessSupplement also a MessageReceiver) as keeping
that would cause classes that need to be both WebProcessSupplements and
NetworkProcessSupplements inherit from MessageReceiver twice.

* GNUmakefile.list.am:
* NetworkProcess/NetworkProcess.cpp:
(WebKit::NetworkProcess::NetworkProcess):
(WebKit::NetworkProcess::downloadsAuthenticationManager):
(WebKit::NetworkProcess::initializeNetworkProcess):
* NetworkProcess/NetworkProcess.h:
(WebKit):
(NetworkProcess):
(WebKit::NetworkProcess::supplement):
(WebKit::NetworkProcess::addSupplement):
* Shared/Network/CustomProtocols/CustomProtocolManager.h:
(CustomProtocolManager):
* Shared/Network/NetworkProcessSupplement.h: Added.
(WebKit):
(NetworkProcessSupplement):
(WebKit::NetworkProcessSupplement::~NetworkProcessSupplement):
(WebKit::NetworkProcessSupplement::initialize):
* Target.pri:
* WebKit2.xcodeproj/project.pbxproj:
* WebProcess/ApplicationCache/WebApplicationCacheManager.h:
* WebProcess/Authentication/AuthenticationManager.h:
* WebProcess/Cookies/WebCookieManager.h:
* WebProcess/Geolocation/WebGeolocationManager.h:
* WebProcess/KeyValueStorage/WebKeyValueStorageManager.h:
* WebProcess/MediaCache/WebMediaCacheManager.h:
* WebProcess/Notifications/WebNotificationManager.h:
* WebProcess/ResourceCache/WebResourceCacheManager.h:
* WebProcess/WebCoreSupport/WebDatabaseManager.h:
* WebProcess/WebProcessSupplement.h:
* win/WebKit2.vcproj:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@138569 268f45cc-cd09-0410-ab3c-d52691b4dbfc