Store frame pointers

src/mirror-debugger.js

Index: src/mirror-debugger.js
diff --git a/src/mirror-debugger.js b/src/mirror-debugger.js
index 897413cfda535284fefe7b5fc2361108c20fb958..990135fc55daa6254422806a9a46f176ae60568e 100644
--- a/src/mirror-debugger.js
+++ b/src/mirror-debugger.js
@@ -1429,8 +1429,9 @@ var kFrameDetailsLocalCountIndex = 4;
 var kFrameDetailsSourcePositionIndex = 5;
 var kFrameDetailsConstructCallIndex = 6;
 var kFrameDetailsAtReturnIndex = 7;
-var kFrameDetailsFlagsIndex = 8;
-var kFrameDetailsFirstDynamicIndex = 9;
+var kFrameDetailsFramePointerIndex = 8;
+var kFrameDetailsFlagsIndex = 9;
+var kFrameDetailsFirstDynamicIndex = 10;
 
 var kFrameDetailsNameIndex = 0;
 var kFrameDetailsValueIndex = 1;
@@ -1495,6 +1496,10 @@ FrameDetails.prototype.isAtReturn = function() {
   return this.details_[kFrameDetailsAtReturnIndex];
 };
 
+FrameDetails.prototype.framePointer = function() {
+  %CheckExecutionState(this.break_id_);
+  return this.details_[kFrameDetailsFramePointerIndex];
+};
 
 FrameDetails.prototype.isDebuggerFrame = function() {
   %CheckExecutionState(this.break_id_);