Move message handlers that don't belong in RenderProcessHostImpl to their own files.

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 5d54b170076ee49c23299c4d37fd9ee7e5e4235c..2f9d3e96d71550b52c50c08256b9ae3bc5fb6a93 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -902,8 +902,10 @@ bool RenderProcessHostImpl::OnMessageReceived(const IPC::Message& msg) {
                           SuddenTerminationChanged)
       IPC_MESSAGE_HANDLER(ViewHostMsg_UserMetricsRecordAction,
                           OnUserMetricsRecordAction)
-      IPC_MESSAGE_HANDLER(ViewHostMsg_RevealFolderInOS, OnRevealFolderInOS)
       IPC_MESSAGE_HANDLER(ViewHostMsg_SavedPageAsMHTML, OnSavedPageAsMHTML)
+      // Adding single handlers for your service here is fine, but once your
+      // service needs more than one handler, please extract them into a new
+      // message filter and add that filter to CreateMessageFilters().
       IPC_MESSAGE_UNHANDLED_ERROR()
     IPC_END_MESSAGE_MAP_EX()
 
@@ -1364,12 +1366,6 @@ void RenderProcessHostImpl::OnUserMetricsRecordAction(
   content::RecordComputedAction(action);
 }
 
-void RenderProcessHostImpl::OnRevealFolderInOS(const FilePath& path) {
-  // Only honor the request if appropriate persmissions are granted.
-  if (ChildProcessSecurityPolicyImpl::GetInstance()->CanReadFile(GetID(),
-                                                                 path))
-    content::GetContentClient()->browser()->OpenItem(path);
-}
 
 void RenderProcessHostImpl::OnSavedPageAsMHTML(int job_id, int64 data_size) {
   MHTMLGenerationManager::GetInstance()->MHTMLGenerated(job_id, data_size);