Changed the extension.connect() API not to broadcast to all tabs. Added a

chrome/browser/renderer_host/browser_render_process_host.cc

Index: chrome/browser/renderer_host/browser_render_process_host.cc
diff --git a/chrome/browser/renderer_host/browser_render_process_host.cc b/chrome/browser/renderer_host/browser_render_process_host.cc
index bad0e3e5dcfe07fb6023901999008a2e4bc4795a..f8142f5fd0b837f06efb0a5e629e45f7e1820936 100644
--- a/chrome/browser/renderer_host/browser_render_process_host.cc
+++ b/chrome/browser/renderer_host/browser_render_process_host.cc
@@ -963,17 +963,22 @@ void BrowserRenderProcessHost::Observe(NotificationType type,
 
 void BrowserRenderProcessHost::OnExtensionAddListener(
     const std::string& event_name) {
-  ExtensionMessageService::GetInstance(profile()->GetRequestContext())->
-      AddEventListener(event_name, pid());
+  if (profile()->GetExtensionMessageService()) {
+    profile()->GetExtensionMessageService()->AddEventListener(event_name,
+                                                              pid());
+  }
 }
 
 void BrowserRenderProcessHost::OnExtensionRemoveListener(
     const std::string& event_name) {
-  ExtensionMessageService::GetInstance(profile()->GetRequestContext())->
-      RemoveEventListener(event_name, pid());
+  if (profile()->GetExtensionMessageService()) {
+    profile()->GetExtensionMessageService()->RemoveEventListener(event_name,
+                                                                 pid());
+  }
 }
 
 void BrowserRenderProcessHost::OnExtensionCloseChannel(int port_id) {
-  ExtensionMessageService::GetInstance(profile()->GetRequestContext())->
-      CloseChannel(port_id);
+  if (profile()->GetExtensionMessageService()) {
+    profile()->GetExtensionMessageService()->CloseChannel(port_id);
+  }
 }