Remove dead code for generated code coverage.

src/full-codegen/mips64/full-codegen-mips64.cc

Index: src/full-codegen/mips64/full-codegen-mips64.cc
diff --git a/src/full-codegen/mips64/full-codegen-mips64.cc b/src/full-codegen/mips64/full-codegen-mips64.cc
index ca152913473bde1a04a9f14175ad307873554321..902f510d1ae8403ef7f3c785865ad7bbf6e5939f 100644
--- a/src/full-codegen/mips64/full-codegen-mips64.cc
+++ b/src/full-codegen/mips64/full-codegen-mips64.cc
@@ -449,15 +449,13 @@ void FullCodeGenerator::EmitReturnSequence() {
     // Make sure that the constant pool is not emitted inside of the return
     // sequence.
     { Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_);
-      // Here we use masm_-> instead of the __ macro to avoid the code coverage
-      // tool from instrumenting as we rely on the code size here.
       int32_t arg_count = info_->scope()->num_parameters() + 1;
       int32_t sp_delta = arg_count * kPointerSize;
       SetReturnPosition(literal());
-      masm_->mov(sp, fp);
-      masm_->MultiPop(static_cast<RegList>(fp.bit() | ra.bit()));
-      masm_->Daddu(sp, sp, Operand(sp_delta));
-      masm_->Jump(ra);
+      __ mov(sp, fp);
+      __ MultiPop(static_cast<RegList>(fp.bit() | ra.bit()));
+      __ Daddu(sp, sp, Operand(sp_delta));
+      __ Jump(ra);
     }
   }
 }