Add MEGAMORPHIC state support for KeyedLoadIC

test/cctest/test-heap-profiler.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2377 matching lines @@
   const char* stub_path[] = {
     "::(GC roots)",
     "::(Strong roots)",
     "code_stubs::",
     "::(ArraySingleArgumentConstructorStub code)"
   };
   const v8::HeapGraphNode* node = GetNodeByPath(snapshot,
       stub_path, arraysize(stub_path));
   CHECK_NE(NULL, node);
 
-  const char* builtin_path1[] = {
-    "::(GC roots)",
-    "::(Builtins)",
-    "::(KeyedLoadIC_Generic builtin)"
-  };
+  const char* builtin_path1[] = {"::(GC roots)", "::(Builtins)",
+                                 "::(KeyedLoadIC_Megamorphic builtin)"};
   node = GetNodeByPath(snapshot, builtin_path1, arraysize(builtin_path1));
   CHECK_NE(NULL, node);
 
   const char* builtin_path2[] = {"::(GC roots)", "::(Builtins)",
                                  "::(CompileLazy builtin)"};
   node = GetNodeByPath(snapshot, builtin_path2, arraysize(builtin_path2));
   CHECK_NE(NULL, node);
   v8::String::Utf8Value node_name(node->GetName());
   CHECK_EQ("(CompileLazy builtin)", *node_name);
 }
@@ skipping 425 matching lines @@
   map.AddRange(ToAddress(0x180), 0x80, 6U);
   map.AddRange(ToAddress(0x180), 0x80, 7U);
   CHECK_EQ(7, map.GetTraceNodeId(ToAddress(0x180)));
   CHECK_EQ(5, map.GetTraceNodeId(ToAddress(0x200)));
   CHECK_EQ(3, static_cast<int>(map.size()));
 
   map.Clear();
   CHECK_EQ(0, static_cast<int>(map.size()));
   CHECK_EQ(0, map.GetTraceNodeId(ToAddress(0x400)));
 }