Remove a few unused functions.

webkit/plugins/ppapi/plugin_module.cc

Index: webkit/plugins/ppapi/plugin_module.cc
diff --git a/webkit/plugins/ppapi/plugin_module.cc b/webkit/plugins/ppapi/plugin_module.cc
index 145ba4ddac8ef8344098bf85da5369079bf75da4..2b6b59ab2c73e9f48fe076246aae2b443b736746 100644
--- a/webkit/plugins/ppapi/plugin_module.cc
+++ b/webkit/plugins/ppapi/plugin_module.cc
@@ -146,14 +146,6 @@ void ReleaseResource(PP_Resource resource) {
   }
 }
 
-void* MemAlloc(uint32_t num_bytes) {
-  return malloc(num_bytes);
-}
-
-void MemFree(void* ptr) {
-  free(ptr);
-}
-
 PP_Time GetTime() {
   return TimeToPPTime(base::Time::Now());
 }