Implement SharedMemory::NewAnonymousReadOnly(contents).

chrome/browser/extensions/user_script_master.cc

Index: chrome/browser/extensions/user_script_master.cc
diff --git a/chrome/browser/extensions/user_script_master.cc b/chrome/browser/extensions/user_script_master.cc
index 95b8f6aa33894d95f7fc1ab43effe40573007a9e..2a680a2494aa446ebd115a1a4fa50678aa8a9732 100644
--- a/chrome/browser/extensions/user_script_master.cc
+++ b/chrome/browser/extensions/user_script_master.cc
@@ -283,16 +283,9 @@ static base::SharedMemory* Serialize(const UserScriptList& scripts) {
     }
   }
 
-  // Create the shared memory object.
-  scoped_ptr<base::SharedMemory> shared_memory(new base::SharedMemory());
-
-  if (!shared_memory->CreateAndMapAnonymous(pickle.size()))
-    return NULL;
-
-  // Copy the pickle to shared memory.
-  memcpy(shared_memory->memory(), pickle.data(), pickle.size());
-
-  return shared_memory.release();
+  return base::SharedMemory::NewAnonymousReadOnly(
+      base::StringPiece(static_cast<const char*>(pickle.data()), pickle.size()))
+      .release();
 }
 
 // This method will be called on the file thread.