Removed usesless test instruction.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/19647019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15847 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/lithium-codegen-ia32.cc

@@ -3782,8 +3782,7 @@ void LCodeGen::EmitIntegerMathAbs(LMathAbs* instr) {
   __ test(input_reg, Operand(input_reg));
   Label is_positive;
   __ j(not_sign, &is_positive);
-  __ neg(input_reg);
-  __ test(input_reg, Operand(input_reg));
+  __ neg(input_reg);  // Sets flags.
   DeoptimizeIf(negative, instr->environment());
   __ bind(&is_positive);
 }