Index: Platform/chromium/public/WebWorkerScriptObserver.h
===================================================================
--- Platform/chromium/public/WebWorkerScriptObserver.h	(revision 0)
+++ Platform/chromium/public/WebWorkerScriptObserver.h	(revision 0)
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2013 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef WebWorkerScriptObserver_h
+#define WebWorkerScriptObserver_h
+
+#include <v8.h>
+
+namespace WebKit {
+
+    class WebURL;
+    class WebWorkerRunLoop;
+
+    class WebWorkerScriptObserver {
+    public:
+        // Notifies that a new script context has been created for a worker.
+        // This will be called only once per worker context.
+        virtual void didCreateWorkerScriptContext(const WebWorkerRunLoop&, const WebURL&, v8::Handle<v8::Context>) { }
+
+        // WebKit is about to release its reference to a v8 context for a worker.
+        virtual void willReleaseWorkerScriptContext(const WebWorkerRunLoop&, const WebURL&, v8::Handle<v8::Context>) { }
+
+    protected:
+        virtual ~WebWorkerScriptObserver() { }
+    };
+
+}  // namespace WebKit
+
+#endif

Property changes on: Platform\chromium\public\WebWorkerScriptObserver.h
___________________________________________________________________
Added: svn:eol-style
   + LF

Index: WebCore/bindings/v8/WorkerScriptController.cpp
===================================================================
--- WebCore/bindings/v8/WorkerScriptController.cpp	(revision 136040)
+++ WebCore/bindings/v8/WorkerScriptController.cpp	(working copy)
@@ -50,11 +50,23 @@
 
 #if PLATFORM(CHROMIUM)
 #include <public/Platform.h>
+#include <public/WebURL.h>
 #include <public/WebWorkerRunLoop.h>
+#include <public/WebWorkerScriptObserver.h>
 #endif
 
 namespace WebCore {
 
+namespace {
+
+static Vector<WebKit::WebWorkerScriptObserver*>& observerVector()
+{
+    AtomicallyInitializedStatic(Vector<WebKit::WebWorkerScriptObserver*>&, observers = *new Vector<WebKit::WebWorkerScriptObserver*>);
+    return observers;
+}
+
+}  // namespace
+
 WorkerScriptController::WorkerScriptController(WorkerContext* workerContext)
     : m_workerContext(workerContext)
     , m_isolate(v8::Isolate::New())
@@ -72,6 +84,8 @@
 WorkerScriptController::~WorkerScriptController()
 {
     m_domDataStore.clear();
+    if (!m_context.isEmpty())
+        notifyWillReleaseWorkerScriptContext();
 #if PLATFORM(CHROMIUM)
     // The corresponding call to didStartWorkerRunLoop is in
     // WorkerThread::workerThread().
@@ -133,6 +147,8 @@
     v8::Handle<v8::Object> globalObject = v8::Handle<v8::Object>::Cast(m_context->Global()->GetPrototype());
     globalObject->SetPrototype(jsWorkerContext);
 
+    notifyDidCreateWorkerScriptContext();
+
     return true;
 }
 
@@ -256,6 +272,39 @@
     return workerContext->script();
 }
 
+void WorkerScriptController::addObserver(WebKit::WebWorkerScriptObserver* observer)
+{
+    if (WebCore::WorkerThread::workerThreadCount() > 0)
+      return;
+
+    observerVector().append(observer);
+}
+
+void WorkerScriptController::removeObserver(WebKit::WebWorkerScriptObserver* observer)
+{
+    if (WebCore::WorkerThread::workerThreadCount() > 0)
+      return;
+
+    Vector<WebKit::WebWorkerScriptObserver*>& observers = observerVector();
+    size_t pos = observers.find(observer);
+    if (pos != notFound)
+        observers.remove(pos);
+}
+
+void WorkerScriptController::notifyDidCreateWorkerScriptContext()
+{
+    const Vector<WebKit::WebWorkerScriptObserver*>& observers = observerVector();
+    for (Vector<WebKit::WebWorkerScriptObserver*>::const_iterator i = observers.begin(); i != observers.end(); ++i)
+        (*i)->didCreateWorkerScriptContext(WebKit::WebWorkerRunLoop(&m_workerContext->thread()->runLoop()), m_workerContext->url(), m_context.get());
+}
+
+void WorkerScriptController::notifyWillReleaseWorkerScriptContext()
+{
+    const Vector<WebKit::WebWorkerScriptObserver*>& observers = observerVector();
+    for (Vector<WebKit::WebWorkerScriptObserver*>::const_iterator i = observers.begin(); i != observers.end(); ++i)
+        (*i)->willReleaseWorkerScriptContext(WebKit::WebWorkerRunLoop(&m_workerContext->thread()->runLoop()), m_workerContext->url(), m_context.get());
+}
+
 } // namespace WebCore
 
 #endif // ENABLE(WORKERS)
Index: WebCore/bindings/v8/WorkerScriptController.h
===================================================================
--- WebCore/bindings/v8/WorkerScriptController.h	(revision 136040)
+++ WebCore/bindings/v8/WorkerScriptController.h	(working copy)
@@ -40,6 +40,10 @@
 #include <wtf/Threading.h>
 #include <wtf/text/TextPosition.h>
 
+namespace WebKit {
+class WebWorkerScriptObserver;
+}
+
 namespace WebCore {
 
     class ScriptSourceCode;
@@ -95,10 +99,17 @@
         // Returns a local handle of the context.
         v8::Local<v8::Context> context() { return v8::Local<v8::Context>::New(m_context.get()); }
 
+        // Add or remove an observer. Can only be called while no WebWorkers exist.
+        static void addObserver(WebKit::WebWorkerScriptObserver*);
+        static void removeObserver(WebKit::WebWorkerScriptObserver*);
+
     private:
         bool initializeContextIfNeeded();
         void disposeContext();
 
+        void notifyDidCreateWorkerScriptContext();
+        void notifyWillReleaseWorkerScriptContext();
+
         WorkerContext* m_workerContext;
         v8::Isolate* m_isolate;
         ScopedPersistent<v8::Context> m_context;
Index: WebKit/chromium/public/WebWorkerInfo.h
===================================================================
--- WebKit/chromium/public/WebWorkerInfo.h	(revision 136040)
+++ WebKit/chromium/public/WebWorkerInfo.h	(working copy)
@@ -35,9 +35,15 @@
 
 namespace WebKit {
 
+class WebWorkerScriptObserver;
+
 class WebWorkerInfo {
 public:
     WEBKIT_EXPORT static unsigned dedicatedWorkerCount();
+
+    // Add or remove an observer. Can only be called while no WebWorkers exist.
+    WEBKIT_EXPORT static void addScriptObserver(WebWorkerScriptObserver*);
+    WEBKIT_EXPORT static void removeScriptObserver(WebWorkerScriptObserver*);
 };
 
 }
Index: WebKit/chromium/public/WebWorkerScriptObserver.h
===================================================================
--- WebKit/chromium/public/WebWorkerScriptObserver.h	(revision 0)
+++ WebKit/chromium/public/WebWorkerScriptObserver.h	(revision 0)
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2013 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "../../../Platform/chromium/public/WebWorkerScriptObserver.h"

Property changes on: WebKit\chromium\public\WebWorkerScriptObserver.h
___________________________________________________________________
Added: svn:eol-style
   + LF

Index: WebKit/chromium/src/WebWorkerInfo.cpp
===================================================================
--- WebKit/chromium/src/WebWorkerInfo.cpp	(revision 136040)
+++ WebKit/chromium/src/WebWorkerInfo.cpp	(working copy)
@@ -31,6 +31,7 @@
 #include "config.h"
 #include "WebWorkerInfo.h"
 
+#include "WorkerScriptController.h"
 #include "WorkerThread.h"
 
 namespace WebKit {
@@ -40,4 +41,14 @@
     return WebCore::WorkerThread::workerThreadCount();
 }
 
+void WebWorkerInfo::addScriptObserver(WebWorkerScriptObserver* observer)
+{
+    WebCore::WorkerScriptController::addObserver(observer);
 }
+
+void WebWorkerInfo::removeScriptObserver(WebWorkerScriptObserver* observer)
+{
+    WebCore::WorkerScriptController::removeObserver(observer);
+}
+
+}