9 files changed, 33 insertions, 12 deletions
diff --git a/base/base_switches.cc b/base/base_switches.cc
index 46b7676..77d263c 100644
--- a/base/base_switches.cc
+++ b/base/base_switches.cc
@@ -40,8 +40,4 @@ const wchar_t kEnableDCHECK[]                  = L"enable-dcheck";
 // Available at http://www.adambarth.com/papers/2008/jackson-barth.pdf
 const wchar_t kForceHTTPS[]                    = L"force-https";
 
-// Run content scripts in their own isolated world instead of just in a new
-// context.
-const wchar_t kIsolatedWorld[]                 = L"isolated-world";
-
 }  // namespace switches
diff --git a/base/base_switches.h b/base/base_switches.h
index 7b66ad5..97a3691 100644
--- a/base/base_switches.h
+++ b/base/base_switches.h
@@ -17,7 +17,6 @@ extern const wchar_t kNoErrorDialogs[];
 extern const wchar_t kProcessType[];
 extern const wchar_t kEnableDCHECK[];
 extern const wchar_t kForceHTTPS[];
-extern const wchar_t kIsolatedWorld[];
 
 }  // namespace switches
 
diff --git a/chrome/browser/renderer_host/browser_render_process_host.cc b/chrome/browser/renderer_host/browser_render_process_host.cc
index b18e729..bde0294 100644
--- a/chrome/browser/renderer_host/browser_render_process_host.cc
+++ b/chrome/browser/renderer_host/browser_render_process_host.cc
@@ -346,7 +346,6 @@ bool BrowserRenderProcessHost::Init() {
     switches::kDisableAudio,
     switches::kSimpleDataSource,
     switches::kEnableBenchmarking,
-    switches::kIsolatedWorld,
   };
 
   for (size_t i = 0; i < arraysize(switch_names); ++i) {
diff --git a/chrome/renderer/user_script_slave.cc b/chrome/renderer/user_script_slave.cc
index 9692736..48017c1 100644
--- a/chrome/renderer/user_script_slave.cc
+++ b/chrome/renderer/user_script_slave.cc
@@ -160,7 +160,7 @@ bool UserScriptSlave::InjectScripts(WebFrame* frame,
                 StringPrintf(kInitExtension, script->extension_id().c_str()))));
       }
 
-      frame->ExecuteScriptInNewContext(&sources.front(), sources.size());
+      frame->ExecuteScriptInNewWorld(&sources.front(), sources.size());
     }
   }
 
diff --git a/webkit/api/public/WebFrame.h b/webkit/api/public/WebFrame.h
index fa7e5f5..acb8dff 100644
--- a/webkit/api/public/WebFrame.h
+++ b/webkit/api/public/WebFrame.h
@@ -145,6 +145,13 @@ namespace WebKit {
         virtual void executeScriptInNewContext(const WebScriptSource* sources,
                                                unsigned numSources) = 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.
+        virtual void executeScriptInNewWorld(const WebScriptSource* sources,
+                                             unsigned numSources) = 0;
+
         // Logs to the console associated with this frame.
         virtual void addMessageToConsole(const WebConsoleMessage&) = 0;
 
diff --git a/webkit/glue/webframe.h b/webkit/glue/webframe.h
index 2d624d4..4fdede8 100644
--- a/webkit/glue/webframe.h
+++ b/webkit/glue/webframe.h
@@ -143,6 +143,13 @@ class WebFrame {
   virtual void ExecuteScriptInNewContext(
       const WebKit::WebScriptSource* sources, int num_sources) = 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.
+  virtual void ExecuteScriptInNewWorld(
+      const WebKit::WebScriptSource* sources, int num_sources) = 0;
+
   // Inserts the given CSS styles at the beginning of the document.
   virtual bool InsertCSSStyles(const std::string& css) = 0;
 
diff --git a/webkit/glue/webframe_impl.cc b/webkit/glue/webframe_impl.cc
index f74dd2c..09a049f 100644
--- a/webkit/glue/webframe_impl.cc
+++ b/webkit/glue/webframe_impl.cc
@@ -1604,10 +1604,21 @@ void WebFrameImpl::ExecuteScriptInNewContext(
         sources_in[i].startLine));
   }
 
-  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kIsolatedWorld))
-    frame_->script()->evaluateInNewWorld(sources);
-  else
-    frame_->script()->evaluateInNewContext(sources);
+  frame_->script()->evaluateInNewContext(sources);
+}
+
+void WebFrameImpl::ExecuteScriptInNewWorld(
+    const WebScriptSource* sources_in, int num_sources) {
+  Vector<WebCore::ScriptSourceCode> sources;
+
+  for (int i = 0; i < num_sources; ++i) {
+    sources.append(WebCore::ScriptSourceCode(
+        webkit_glue::WebStringToString(sources_in[i].code),
+        webkit_glue::WebURLToKURL(sources_in[i].url),
+        sources_in[i].startLine));
+  }
+
+  frame_->script()->evaluateInNewWorld(sources);
 }
 
 std::wstring WebFrameImpl::GetName() {
diff --git a/webkit/glue/webframe_impl.h b/webkit/glue/webframe_impl.h
index f22f58b..1795bc8 100644
--- a/webkit/glue/webframe_impl.h
+++ b/webkit/glue/webframe_impl.h
@@ -105,6 +105,8 @@ class WebFrameImpl : public WebFrame, public base::RefCounted<WebFrameImpl> {
   virtual void ExecuteScript(const WebKit::WebScriptSource& source);
   virtual void ExecuteScriptInNewContext(
       const WebKit::WebScriptSource* sources, int num_sources);
+  virtual void ExecuteScriptInNewWorld(
+      const WebKit::WebScriptSource* sources, int num_sources);
   virtual bool InsertCSSStyles(const std::string& css);
   virtual WebKit::WebHistoryItem GetPreviousHistoryItem() const;
   virtual WebKit::WebHistoryItem GetCurrentHistoryItem() const;
diff --git a/webkit/tools/test_shell/layout_test_controller.cc b/webkit/tools/test_shell/layout_test_controller.cc
index 374f95f..5ae2bb3 100644
--- a/webkit/tools/test_shell/layout_test_controller.cc
+++ b/webkit/tools/test_shell/layout_test_controller.cc
@@ -351,7 +351,7 @@ class WorkItemIsolatedWorldScript : public LayoutTestController::WorkItem {
   WorkItemIsolatedWorldScript(const string& script) : script_(script) {}
   bool Run(TestShell* shell) {
     WebScriptSource source(WebString::fromUTF8(script_));
-    shell->webView()->GetMainFrame()->ExecuteScriptInNewContext(&source, 1);
+    shell->webView()->GetMainFrame()->ExecuteScriptInNewWorld(&source, 1);
     return false;
   }
  private: