https://bugs.webkit.org/show_bug.cgi?id=42028

Reviewed by Dan Bernstein.

* WebProcess/Plugins/Netscape/NetscapePlugin.cpp:
(WebKit::NetscapePlugin::NetscapePlugin):
Let the plug-in module know that a plug-in has been created.

(WebKit::NetscapePlugin::~NetscapePlugin):
Let the plug-in module know that a plug-in has been destroyed.

(WebKit::NetscapePlugin::initialize):
Pass the MIME type and parameters to the plug-in.

* WebProcess/Plugins/Netscape/NetscapePluginModule.cpp:
(WebKit::initializedNetscapePluginModules):
Add list of initialized plug-in modules.

(WebKit::NetscapePluginModule::NetscapePluginModule):
Initialize m_pluginCount to 0.

(WebKit::NetscapePluginModule::~NetscapePluginModule):
Assert that we're not in the list of initialized plug-ins.

(WebKit::NetscapePluginModule::pluginCreated):
Increment the plug-in count.

(WebKit::NetscapePluginModule::pluginDestroyed):
Decrement the plug-in count and call shutdown if it's 0.

(WebKit::NetscapePluginModule::shutdown):
Call NP_Shutdown and remove the plug-in from the list of initialized plug-ins.

(WebKit::NetscapePluginModule::getOrCreate):
Look for an already initialized plug-in module before creating one.

(WebKit::NetscapePluginModule::load):
Set m_isInitialized to true.

* WebProcess/Plugins/Netscape/mac/NetscapePluginModuleMac.cpp:
(WebKit::NetscapePluginModule::unload):
Leak the CFBundleRef to avoid possible crashes.

* WebProcess/WebCoreSupport/WebFrameLoaderClient.cpp:
(WebKit::WebFrameLoaderClient::createPlugin):
Call getOrCreate instead of create.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@63047 268f45cc-cd09-0410-ab3c-d52691b4dbfc