Restore stack backtrace tests removed in revision 1785.

src/arm/codegen-arm.h

Index: src/arm/codegen-arm.h
diff --git a/src/arm/codegen-arm.h b/src/arm/codegen-arm.h
index a5f77fe6956ddd67893d7dd4925e83eb657e6874..c098acdd77fd064e75fb314eb88df8967152622e 100644
--- a/src/arm/codegen-arm.h
+++ b/src/arm/codegen-arm.h
@@ -303,7 +303,17 @@ class CodeGenerator: public AstVisitor {
   void Branch(bool if_true, JumpTarget* target);
   void CheckStack();
 
+  struct InlineRuntimeLUT {
+    void (CodeGenerator::*method)(ZoneList<Expression*>*);
+    const char* name;
+  };
+
+  static InlineRuntimeLUT* FindInlineRuntimeLUT(Handle<String> name);
   bool CheckForInlineRuntimeCall(CallRuntime* node);
+  static bool PatchInlineRuntimeEntry(Handle<String> name,
+                                      const InlineRuntimeLUT& new_entry,
+                                      InlineRuntimeLUT* old_entry);
+
   Handle<JSFunction> BuildBoilerplate(FunctionLiteral* node);
   void ProcessDeclarations(ZoneList<Declaration*>* declarations);
 
@@ -433,6 +443,8 @@ class CodeGenerator: public AstVisitor {
   // in a spilled state.
   bool in_spilled_code_;
 
+  static InlineRuntimeLUT kInlineRuntimeLUT[];
+
   friend class VirtualFrame;
   friend class JumpTarget;
   friend class Reference;