Fix debug-debugger.js wrt strict mode.

src/debug-debugger.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 "use strict";
 
 // Default number of frames to include in the response to backtrace request.
 var kDefaultBacktraceLength = 10;
 
 var Debug = {};
 
@@ skipping 1869 matching lines @@
   }
   response.body = this.exec_state_.frame();
 };
 
 
 DebugCommandProcessor.prototype.resolveFrameFromScopeDescription_ =
     function(scope_description) {
   // Get the frame for which the scope or scopes are requested.
   // With no frameNumber argument use the currently selected frame.
   if (scope_description && !IS_UNDEFINED(scope_description.frameNumber)) {
-    frame_index = scope_description.frameNumber;
+    var frame_index = scope_description.frameNumber;
     if (frame_index < 0 || this.exec_state_.frameCount() <= frame_index) {
       throw new Error('Invalid frame number');
     }
     return this.exec_state_.frame(frame_index);
   } else {
     return this.exec_state_.frame();
   }
 };
 
 
@@ skipping 64 matching lines @@
 
 // Reads value from protocol description. Description may be in form of type
 // (for singletons), raw value (primitive types supported in JSON),
 // string value description plus type (for primitive values) or handle id.
 // Returns raw value or throws exception.
 DebugCommandProcessor.resolveValue_ = function(value_description) {
   if ("handle" in value_description) {
     var value_mirror = LookupMirror(value_description.handle);
     if (!value_mirror) {
       throw new Error("Failed to resolve value by handle, ' #" +
-          mapping.handle + "# not found");
+          value_description.handle + "# not found");
     }
     return value_mirror.value();
   } else if ("stringDescription" in value_description) {
     if (value_description.type == BOOLEAN_TYPE) {
       return Boolean(value_description.stringDescription);
     } else if (value_description.type == NUMBER_TYPE) {
       return Number(value_description.stringDescription);
     } if (value_description.type == STRING_TYPE) {
       return String(value_description.stringDescription);
     } else {
@@ skipping 134 matching lines @@
   // Pull out arguments.
   var handles = request.arguments.handles;
 
   // Check for legal arguments.
   if (IS_UNDEFINED(handles)) {
     return response.failed('Argument "handles" missing');
   }
 
   // Set 'includeSource' option for script lookup.
   if (!IS_UNDEFINED(request.arguments.includeSource)) {
-    includeSource = %ToBoolean(request.arguments.includeSource);
+    var includeSource = %ToBoolean(request.arguments.includeSource);
     response.setOption('includeSource', includeSource);
   }
 
   // Lookup handles.
   var mirrors = {};
   for (var i = 0; i < handles.length; i++) {
     var handle = handles[i];
     var mirror = LookupMirror(handle);
     if (!mirror) {
       return response.failed('Object #' + handle + '# not found');
@@ skipping 440 matching lines @@
 
     default:
       json = null;
   }
   return json;
 }
 
 Debug.TestApi = {
   CommandProcessorResolveValue: DebugCommandProcessor.resolveValue_
 };