Unify deoptimizer for stub failure trampoline frames.

src/deoptimizer.h

Index: src/deoptimizer.h
diff --git a/src/deoptimizer.h b/src/deoptimizer.h
index b4d8873ea1794614df47ecbed2063cc3dfb00aa0..6231c7c4ae717c1a1206e68e853618dbd57f1ba1 100644
--- a/src/deoptimizer.h
+++ b/src/deoptimizer.h
@@ -388,6 +388,15 @@ class Deoptimizer : public Malloced {
   // deoptimizations the input frame is filled in generated code.
   void FillInputFrame(Address tos, JavaScriptFrame* frame);
 
+  // Fill the given output frame's registers to contain the failure handler
+  // address and the number of parameters for a stub failure trampoline.
+  void SetPlatformCompiledStubRegisters(FrameDescription* output_frame,
+                                        CodeStubInterfaceDescriptor* desc);
+
+  // Fill the given output frame's double registers with the original values
+  // from the input frame's double registers.
+  void CopyDoubleRegisters(FrameDescription* output_frame);
+
   Isolate* isolate_;
   JSFunction* function_;
   Code* compiled_code_;