Eliminate "temporary" and "uninitialized" isolated worlds

Source/WebKit/chromium/public/WebFrame.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 219 matching lines @@
     // Executes script in the context of the current page.
     virtual void executeScript(const WebScriptSource&) = 0;
 
     // Executes JavaScript in a new world associated with the web frame.
     // The script gets its own global scope and its own prototypes for
     // intrinsic JavaScript objects (String, Array, and so-on). It also
     // gets its own wrappers for all DOM nodes and DOM constructors.
     // extensionGroup is an embedder-provided specifier that controls which
     // v8 extensions are loaded into the new context - see
     // WebKit::registerExtension for the corresponding specifier.
+    //
+    // worldID must be > 0 (as 0 represents the main world).
     virtual void executeScriptInIsolatedWorld(
         int worldID, const WebScriptSource* sources, unsigned numSources,
         int extensionGroup) = 0;
 
     // Associates an isolated world (see above for description) with a security
     // origin. XMLHttpRequest instances used in that world will be considered
     // to come from that origin, not the frame's.
     virtual void setIsolatedWorldSecurityOrigin(
         int worldID, const WebSecurityOrigin&) = 0;
 
@@ skipping 15 matching lines @@
 
     // Check if the scripting URL represents a mixed content condition relative
     // to this frame.
     virtual bool checkIfRunInsecureContent(const WebURL&) const = 0;
 
     // Executes script in the context of the current page and returns the value
     // that the script evaluated to.
     virtual v8::Handle<v8::Value> executeScriptAndReturnValue(
         const WebScriptSource&) = 0;
 
+    // worldID must be > 0 (as 0 represents the main world).
     virtual void executeScriptInIsolatedWorld(
         int worldID, const WebScriptSource* sourcesIn, unsigned numSources,
         int extensionGroup, WebVector<v8::Local<v8::Value> >* results) = 0;
 
     // Call the function with the given receiver and arguments, bypassing
     // canExecute().
     virtual v8::Handle<v8::Value> callFunctionEvenIfScriptDisabled(
         v8::Handle<v8::Function>,
         v8::Handle<v8::Object>,
         int argc,
@@ skipping 365 matching lines @@
     // text form. This is used only by layout tests.
     virtual WebString layerTreeAsText(bool showDebugInfo = false) const = 0;
 
 protected:
     ~WebFrame() { }
 };
 
 } // namespace WebKit
 
 #endif