[runtime] Replace the EQUALS builtin with proper Object::Equals.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index c685d223ccc8791903928e76f7f6d989b2c47786..ebf6b0fb141d551e65ccb1f74163b989f0ecf1f3 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -1867,19 +1867,15 @@ void CompareICStub::GenerateGeneric(MacroAssembler* masm) {
   __ push(eax);
 
   // Figure out which native to call and setup the arguments.
-  if (cc == equal && strict()) {
+  if (cc == equal) {
     __ push(ecx);
-    __ TailCallRuntime(Runtime::kStrictEquals, 2, 1);
+    __ TailCallRuntime(strict() ? Runtime::kStrictEquals : Runtime::kEquals, 2,
+                       1);
   } else {
-    int native_context_index;
-    if (cc == equal) {
-      native_context_index = Context::EQUALS_BUILTIN_INDEX;
-    } else {
-      native_context_index = is_strong(strength())
-                                 ? Context::COMPARE_STRONG_BUILTIN_INDEX
-                                 : Context::COMPARE_BUILTIN_INDEX;
-      __ push(Immediate(Smi::FromInt(NegativeComparisonResult(cc))));
-    }
+    int native_context_index = is_strong(strength())
+                                   ? Context::COMPARE_STRONG_BUILTIN_INDEX
+                                   : Context::COMPARE_BUILTIN_INDEX;
+    __ push(Immediate(Smi::FromInt(NegativeComparisonResult(cc))));
 
     // Restore return address on the stack.
     __ push(ecx);