Move NPObjectBase and PluginChannelBase from content/plugin to content/common

Also rename PluginChannelBase to NPChannelBase, fix variable naming to be agnostic of plugins, and fix a comment in NPChannelBase.

This change is refactoring only and introduces no change in behaviour.

BUG=96703

Review URL: http://codereview.chromium.org/7891003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@101874 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/renderer/render_thread.cc b/content/renderer/render_thread.cc
index 3be07a48..3e11f98 100644
--- a/content/renderer/render_thread.cc
+++ b/content/renderer/render_thread.cc
@@ -74,7 +74,7 @@
 #include "content/plugin/plugin_channel.h"
 #else
 #include "base/memory/scoped_handle.h"
-#include "content/plugin/plugin_channel_base.h"
+#include "content/common/np_channel_base.h"
 #endif
 
 #if defined(OS_WIN)
@@ -245,7 +245,7 @@
   // TODO(port)
 #if defined(OS_WIN)
   // Clean up plugin channels before this thread goes away.
-  PluginChannelBase::CleanupChannels();
+  NPChannelBase::CleanupChannels();
   // Don't call COM if the renderer is in the sandbox.
   if (RenderProcessImpl::InProcessPlugins())
     CoUninitialize();