Remove RefCountedMallocedMemory, it's not used.

base/memory/ref_counted_memory.cc

Index: base/memory/ref_counted_memory.cc
diff --git a/base/memory/ref_counted_memory.cc b/base/memory/ref_counted_memory.cc
index 477c941355c23660b77961d1b775fa4f8e45aa8f..b50e234c67498762274ef30f389f8144ad86bbe4 100644
--- a/base/memory/ref_counted_memory.cc
+++ b/base/memory/ref_counted_memory.cc
@@ -4,8 +4,6 @@
 
 #include "base/memory/ref_counted_memory.h"
 
-#include <stdlib.h>
-
 #include "base/logging.h"
 
 namespace base {
@@ -79,22 +77,4 @@ size_t RefCountedString::size() const {
   return data_.size();
 }
 
-RefCountedMallocedMemory::RefCountedMallocedMemory(
-    void* data, size_t length)
-    : data_(reinterpret_cast<unsigned char*>(data)), length_(length) {
-  DCHECK(data || length == 0);
-}
-
-const unsigned char* RefCountedMallocedMemory::front() const {
-  return length_ ? data_ : NULL;
-}
-
-size_t RefCountedMallocedMemory::size() const {
-  return length_;
-}
-
-RefCountedMallocedMemory::~RefCountedMallocedMemory() {
-  free(data_);
-}
-
 }  //  namespace base