Delete some unused code found by -Wunused-function

content/renderer/pepper/pepper_url_request_unittest.cc

Index: content/renderer/pepper/pepper_url_request_unittest.cc
diff --git a/content/renderer/pepper/pepper_url_request_unittest.cc b/content/renderer/pepper/pepper_url_request_unittest.cc
index ed7c59ee885666cccbcc5cd5914e6bc1a41b343f..6716d87b21704dd9701d00953d05a402385f0a75 100644
--- a/content/renderer/pepper/pepper_url_request_unittest.cc
+++ b/content/renderer/pepper/pepper_url_request_unittest.cc
@@ -42,10 +42,6 @@ bool IsExpected(const WebString& web_string, const char* expected) {
   return IsExpected(web_string.utf8(), expected);
 }
 
-bool IsNullOrEmpty(const WebString& web_string) {
-  return web_string.isNull() || web_string.isEmpty();
-}
-
 // The base class destructor is protected, so derive.
 class TestWebFrameClient : public WebFrameClient {
 };