Add asserts to ensure that we:

src/mips/full-codegen-mips.cc

Index: src/mips/full-codegen-mips.cc
===================================================================
--- src/mips/full-codegen-mips.cc	(revision 9277)
+++ src/mips/full-codegen-mips.cc	(working copy)
@@ -162,6 +162,11 @@
     __ bind(&ok);
   }
 
+  // Open a frame scope to indicate that there is a frame on the stack.  The
+  // MANUAL indicates that the scope shouldn't actually generate code to set up
+  // the frame (that is done below).
+  FrameScope frame_scope(masm_, StackFrame::MANUAL);
+
   int locals_count = info->scope()->num_stack_slots();
 
   __ Push(ra, fp, cp, a1);