libchrome: Several upstreamable fixes from libchrome

base/memory/ref_counted.h

Index: base/memory/ref_counted.h
diff --git a/base/memory/ref_counted.h b/base/memory/ref_counted.h
index 5b866d14c812fc9645a0ef8285c0369ba93301ac..96231af233db45481f5ac7835a9a83a02b600a49 100644
--- a/base/memory/ref_counted.h
+++ b/base/memory/ref_counted.h
@@ -425,12 +425,12 @@ bool operator==(const T* lhs, const scoped_refptr<U>& rhs) {
 }
 
 template <typename T>
-bool operator==(const scoped_refptr<T>& lhs, std::nullptr_t null) {
+bool operator==(const scoped_refptr<T>& lhs, std::nullptr_t) {
   return !static_cast<bool>(lhs);
 }
 
 template <typename T>
-bool operator==(std::nullptr_t null, const scoped_refptr<T>& rhs) {
+bool operator==(std::nullptr_t, const scoped_refptr<T>& rhs) {
   return !static_cast<bool>(rhs);
 }