Moved the following IPC messages used by the chrome NPAPI plugin installer out of content

chrome/browser/chrome_plugin_message_filter.cc

Index: chrome/browser/chrome_plugin_message_filter.cc
===================================================================
--- chrome/browser/chrome_plugin_message_filter.cc	(revision 98657)
+++ chrome/browser/chrome_plugin_message_filter.cc	(working copy)
@@ -5,11 +5,12 @@
 #include "chrome/browser/chrome_plugin_message_filter.h"
 
 #include "chrome/browser/browser_process.h"
-#include "content/browser/browser_thread.h"
 #include "chrome/browser/plugin_download_helper.h"
+#include "chrome/browser/plugin_observer.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/common/chrome_plugin_messages.h"
+#include "content/browser/browser_thread.h"
 #include "content/browser/plugin_process_host.h"
-#include "content/common/plugin_messages.h"
 #include "net/url_request/url_request_context_getter.h"
 
 static const char kDefaultPluginFinderURL[] =
@@ -26,10 +27,12 @@
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ChromePluginMessageFilter, message)
 #if defined(OS_WIN)
-    IPC_MESSAGE_HANDLER(PluginProcessHostMsg_DownloadUrl, OnDownloadUrl)
+    IPC_MESSAGE_HANDLER(ChromePluginProcessHostMsg_DownloadUrl, OnDownloadUrl)
 #endif
-    IPC_MESSAGE_HANDLER(PluginProcessHostMsg_GetPluginFinderUrl,
+    IPC_MESSAGE_HANDLER(ChromePluginProcessHostMsg_GetPluginFinderUrl,
                         OnGetPluginFinderUrl)
+    IPC_MESSAGE_HANDLER(ChromePluginProcessHostMsg_MissingPluginStatus,
+                        OnMissingPluginStatus)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -71,3 +74,13 @@
     plugin_finder_url->clear();
   }
 }
+
+void ChromePluginMessageFilter::OnMissingPluginStatus(int status,
+                                                      int render_process_id,
+                                                      int render_view_id,
+                                                      int window) {
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      NewRunnableFunction(&PluginObserver::OnMissingPluginStatus, status,
+                          render_process_id, render_view_id, window));
+}