Move inlined function declarations and support from codegen.* to runtime.*.

src/x64/codegen-x64.h

Index: src/x64/codegen-x64.h
===================================================================
--- src/x64/codegen-x64.h	(revision 5450)
+++ src/x64/codegen-x64.h	(working copy)
@@ -343,15 +343,17 @@
   bool in_spilled_code() const { return in_spilled_code_; }
   void set_in_spilled_code(bool flag) { in_spilled_code_ = flag; }
 
-  // If the name is an inline runtime function call return the number of
-  // expected arguments. Otherwise return -1.
-  static int InlineRuntimeCallArgumentsCount(Handle<String> name);
-
   static Operand ContextOperand(Register context, int index) {
     return Operand(context, Context::SlotOffset(index));
   }
 
  private:
+  // Type of a member function that generates inline code for a native function.
+  typedef void (CodeGenerator::*InlineFunctionGenerator)
+      (ZoneList<Expression*>*);
+
+  static const InlineFunctionGenerator kInlineFunctionGenerators[];
+
   // Construction/Destruction
   explicit CodeGenerator(MacroAssembler* masm);
 
@@ -584,12 +586,9 @@
 
   void CheckStack();
 
-  struct InlineRuntimeLUT {
-    void (CodeGenerator::*method)(ZoneList<Expression*>*);
-    const char* name;
-    int nargs;
-  };
-  static InlineRuntimeLUT* FindInlineRuntimeLUT(Handle<String> name);
+  static InlineFunctionGenerator FindInlineFunctionGenerator(
+      Runtime::FunctionId function_id);
+
   bool CheckForInlineRuntimeCall(CallRuntime* node);
 
   void ProcessDeclarations(ZoneList<Declaration*>* declarations);
@@ -742,8 +741,6 @@
   // in a spilled state.
   bool in_spilled_code_;
 
-  static InlineRuntimeLUT kInlineRuntimeLUT[];
-
   friend class VirtualFrame;
   friend class JumpTarget;
   friend class Reference;