Use big-boy Types to annotate interface descriptor parameters

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index cbcfec6a9f35cff263464a93f70adb12bf40c954..8f478c477ca74cfbb1d69f4d991552f119196ac2 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -9,6 +9,7 @@
 #include "src/ast.h"
 #include "src/bailout-reason.h"
 #include "src/compilation-dependencies.h"
+#include "src/signature.h"
 #include "src/zone.h"
 
 namespace v8 {
@@ -293,6 +294,11 @@ class CompilationInfo {
     optimization_id_ = isolate()->NextOptimizationId();
   }
 
+  void SetFunctionType(Type::FunctionType* function_type) {
+    function_type_ = function_type;
+  }
+  Type::FunctionType* function_type() const { return function_type_; }
+
   void SetStub(CodeStub* code_stub) {
     SetMode(STUB);
     code_stub_ = code_stub;
@@ -484,6 +490,8 @@ class CompilationInfo {
 
   int osr_expr_stack_height_;
 
+  Type::FunctionType* function_type_;
+
   DISALLOW_COPY_AND_ASSIGN(CompilationInfo);
 };