diff -r 000000000000 -r 4f2f89ce4247 WebCore/bindings/v8/DateExtension.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/v8/DateExtension.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,123 @@
+/*
+ * 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
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 "config.h"
+#include "DateExtension.h"
+
+#include "V8Proxy.h"
+#include "V8HiddenPropertyName.h"
+
+namespace WebCore {
+
+DateExtension* DateExtension::extension;
+
+static const char* dateExtensionName = "v8/DateExtension";
+static const char* dateExtensionScript =
+    "(function () {"
+    "  var counter;"
+    "  var orig_getTime;"
+    "  function getTimeOverride() {"
+    "    if (++counter > 1000)"
+    "      OnSleepDetected();"
+    "    return orig_getTime.call(this);"
+    "  };"
+    "  function enableSleepDetection(enable) {"
+    "    if (enable) {"
+    "      counter = 0;"
+    "      orig_getTime = Date.prototype.getTime;"
+    "      Date.prototype.getTime = getTimeOverride;"
+    "    } else {"
+    "      Date.prototype.getTime = orig_getTime;"
+    "    }"
+    "  };"
+    "  native function Setup();"
+    "  native function OnSleepDetected();"
+    "  Setup(Date, enableSleepDetection);"
+    "})()";
+
+DateExtension::DateExtension() : v8::Extension(dateExtensionName, dateExtensionScript)
+{
+}
+
+DateExtension* DateExtension::get()
+{
+    if (!extension)
+        extension = new DateExtension();
+    return extension;
+}
+
+void DateExtension::setAllowSleep(bool allow)
+{
+    v8::Local<v8::Value> result = V8Proxy::currentContext()->Global()->Get(v8::String::New("Date"));
+    if (result.IsEmpty())
+        return;
+
+    v8::Handle<v8::Object> dateObject = v8::Handle<v8::Object>::Cast(result);
+    if (dateObject.IsEmpty())
+        return;
+
+    v8::Local<v8::Value> sleepFunctionHandle = dateObject->GetHiddenValue(V8HiddenPropertyName::sleepFunction());
+    if (sleepFunctionHandle.IsEmpty() || !sleepFunctionHandle->IsFunction())
+        return;
+
+    v8::Handle<v8::Value> argv[1];
+    argv[0] = v8::Boolean::New(!allow);
+    v8::Handle<v8::Function>::Cast(sleepFunctionHandle)->Call(v8::Object::New(), 1, argv);
+}
+
+v8::Handle<v8::FunctionTemplate> DateExtension::GetNativeFunction(v8::Handle<v8::String> name)
+{
+    if (name->Equals(v8::String::New("Setup")))
+        return v8::FunctionTemplate::New(Setup);
+    if (name->Equals(v8::String::New("OnSleepDetected")))
+        return v8::FunctionTemplate::New(OnSleepDetected);
+
+    return v8::Handle<v8::FunctionTemplate>();
+}
+
+v8::Handle<v8::Value> DateExtension::Setup(const v8::Arguments& args)
+{
+    if (args.Length() != 2 || !args[0]->IsObject() || !args[1]->IsFunction())
+        return v8::Undefined();
+
+    v8::Handle<v8::Object> dateObject = v8::Handle<v8::Object>::Cast(args[0]);
+    v8::Handle<v8::Function> enableSleepDetectionFunction = v8::Handle<v8::Function>::Cast(args[1]);
+
+    dateObject->SetHiddenValue(V8HiddenPropertyName::sleepFunction(), enableSleepDetectionFunction);
+    return v8::Undefined();
+}
+
+v8::Handle<v8::Value> DateExtension::OnSleepDetected(const v8::Arguments&)
+{
+    V8Proxy::throwError(V8Proxy::GeneralError, "Too much time spent in unload handler.");
+    return v8::Undefined();
+}
+
+}  // namespace WebCore