Revert "Changing string length field type from int to SMI."

src/ia32/stub-cache-ia32.cc

Index: src/ia32/stub-cache-ia32.cc
diff --git a/src/ia32/stub-cache-ia32.cc b/src/ia32/stub-cache-ia32.cc
index 029e394c643af12afe0d44ffc1b5acb18ce47f03..eba4e1fd5f2bd3f10b0a9551eeaabdd63646f803 100644
--- a/src/ia32/stub-cache-ia32.cc
+++ b/src/ia32/stub-cache-ia32.cc
@@ -221,6 +221,7 @@ void StubCompiler::GenerateLoadStringLength(MacroAssembler* masm,
 
   // Load length from the string and convert to a smi.
   __ mov(eax, FieldOperand(receiver, String::kLengthOffset));
+  __ SmiTag(eax);
   __ ret(0);
 
   // Check if the object is a JSValue wrapper.
@@ -233,6 +234,7 @@ void StubCompiler::GenerateLoadStringLength(MacroAssembler* masm,
   __ mov(scratch2, FieldOperand(receiver, JSValue::kValueOffset));
   GenerateStringCheck(masm, scratch2, scratch1, miss, miss);
   __ mov(eax, FieldOperand(scratch2, String::kLengthOffset));
+  __ SmiTag(eax);
   __ ret(0);
 }