Support re-reading scope variables in protocol and on backed.

Source/bindings/v8/DebuggerScript.js

Index: Source/bindings/v8/DebuggerScript.js
diff --git a/Source/bindings/v8/DebuggerScript.js b/Source/bindings/v8/DebuggerScript.js
index 5760f7d5f51f5aac582890e9e02b2422aa8deacb..dc1eaddf4e16cf362d3708a7d739e057c4682ad3 100644
--- a/Source/bindings/v8/DebuggerScript.js
+++ b/Source/bindings/v8/DebuggerScript.js
@@ -324,7 +324,6 @@ DebuggerScript._frameMirrorToJSCallFrame = function(frameMirror, callerFrame)
     // Get this object.
     var thisObject = frameMirror.details_.receiver();
 
-    // Get scope chain array in format: [<scope type>, <scope object>, <scope type>, <scope object>,...]
     var scopeChain = [];
     var scopeType = [];
     for (var i = 0; i < frameMirror.scopeCount(); i++) {
@@ -333,6 +332,14 @@ DebuggerScript._frameMirrorToJSCallFrame = function(frameMirror, callerFrame)
         scopeChain.push(DebuggerScript._buildScopeObject(scopeMirror));
     }
 
+    // Updates the existing array.
+    function rereadScopes() {
+        for (var i = 0; i < frameMirror.scopeCount(); i++) {
+            var scopeMirror = frameMirror.scope(i);
+            scopeChain[i] = DebuggerScript._buildScopeObject(scopeMirror);
+        }
+    }
+
     function evaluate(expression)
     {
         return frameMirror.evaluate(expression, false).value();
@@ -359,7 +366,8 @@ DebuggerScript._frameMirrorToJSCallFrame = function(frameMirror, callerFrame)
         "evaluate": evaluate,
         "caller": callerFrame,
         "restart": restart,
-        "setVariableValue": setVariableValue
+        "setVariableValue": setVariableValue,
+        "rereadScopes": rereadScopes
     };
 }