Add implicit null pointer and stack overflow checks for Mips.

Bug: 21555893
Change-Id: I2a995be128a5603d08753c14956dd8c8240ac63c
diff --git a/compiler/dex/quick/mips/codegen_mips.h b/compiler/dex/quick/mips/codegen_mips.h
index 713264e..43fbcbd 100644
--- a/compiler/dex/quick/mips/codegen_mips.h
+++ b/compiler/dex/quick/mips/codegen_mips.h
@@ -79,6 +79,7 @@
   OVERRIDE;
   LIR* CheckSuspendUsingLoad() OVERRIDE;
   RegStorage LoadHelper(QuickEntrypointEnum trampoline) OVERRIDE;
+  void ForceImplicitNullCheck(RegStorage reg, int opt_flags, bool is_wide);
   LIR* LoadBaseDisp(RegStorage r_base, int displacement, RegStorage r_dest, OpSize size,
                     VolatileKind is_volatile) OVERRIDE;
   LIR* LoadBaseIndexed(RegStorage r_base, RegStorage r_index, RegStorage r_dest, int scale,