Make _CallFunction proxy-aware.

src/x64/debug-x64.cc

Index: src/x64/debug-x64.cc
diff --git a/src/x64/debug-x64.cc b/src/x64/debug-x64.cc
index 2149fc2d14de9f8badd8a3c83e2bfdb693389ffe..339b961fe2c8a743c1271b49f1c6213ca2544403 100644
--- a/src/x64/debug-x64.cc
+++ b/src/x64/debug-x64.cc
@@ -250,12 +250,12 @@ void Debug::GenerateReturnDebugBreak(MacroAssembler* masm) {
 }
 
 
-void Debug::GenerateStubNoRegistersDebugBreak(MacroAssembler* masm) {
+void Debug::GenerateCallFunctionStubDebugBreak(MacroAssembler* masm) {
   // Register state for stub CallFunction (from CallFunctionStub in ic-x64.cc).
   // ----------- S t a t e -------------
-  //  No registers used on entry.
+  //  -- rdi : function
   // -----------------------------------
-  Generate_DebugBreakCallHelper(masm, 0, 0, false);
+  Generate_DebugBreakCallHelper(masm, rdi.bit(), 0, false);
 }