[strong] Implement strong property access semantics

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index 7c2c362d3f0253c8f68169e21a15a50ca3aac7b1..d79d2f458a1620f86478a13827bd7888be2bae97 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -123,7 +123,6 @@ Handle<Code> PlatformCodeStub::GenerateCode() {
   // Create the code object.
   CodeDesc desc;
   masm.GetCode(&desc);
-
   // Copy the generated code into a heap object.
   Code::Flags flags = Code::ComputeFlags(
       GetCodeKind(),
@@ -628,7 +627,9 @@ void LoadDictionaryElementStub::InitializeDescriptor(
 void KeyedLoadGenericStub::InitializeDescriptor(
     CodeStubDescriptor* descriptor) {
   descriptor->Initialize(
-      Runtime::FunctionForId(Runtime::kKeyedGetProperty)->entry);
+      Runtime::FunctionForId(is_strong(language_mode())
+                                 ? Runtime::kKeyedGetPropertyStrong
+                                 : Runtime::kKeyedGetProperty)->entry);
 }