Remove keep-alive impulse IPCs from NaCl modules.

components/nacl/browser/test_nacl_browser_delegate.cc

Index: components/nacl/browser/test_nacl_browser_delegate.cc
diff --git a/components/nacl/browser/test_nacl_browser_delegate.cc b/components/nacl/browser/test_nacl_browser_delegate.cc
index dfa61d23a28dd1a6d6b1c124012a5d649efc4950..81e925c1ec322b21b023e858d8e101496fa31df1 100644
--- a/components/nacl/browser/test_nacl_browser_delegate.cc
+++ b/components/nacl/browser/test_nacl_browser_delegate.cc
@@ -57,11 +57,6 @@ bool TestNaClBrowserDelegate::URLMatchesDebugPatterns(
   return false;
 }
 
-content::BrowserPpapiHost::OnKeepaliveCallback
-TestNaClBrowserDelegate::GetOnKeepaliveCallback() {
-  return content::BrowserPpapiHost::OnKeepaliveCallback();
-}
-
 bool TestNaClBrowserDelegate::IsNonSfiModeAllowed(
     const base::FilePath& profile_directory,
     const GURL& manifest_url) {