Gather the ServiceWorker client information in the browser process.

content/common/service_worker/service_worker_client_info.cc

Index: content/common/service_worker/service_worker_client_info.cc
diff --git a/content/common/service_worker/service_worker_client_info.cc b/content/common/service_worker/service_worker_client_info.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5662818cfa669a425ab15d160517ccb1f867ae32
--- /dev/null
+++ b/content/common/service_worker/service_worker_client_info.cc
@@ -0,0 +1,42 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/common/service_worker/service_worker_client_info.h"
+
+#include "base/logging.h"
+#include "content/common/service_worker/service_worker_types.h"
+
+namespace content {
+
+ServiceWorkerClientInfo::ServiceWorkerClientInfo()
+  : client_id(kInvalidServiceWorkerClientId),
+    page_visibility_state(blink::WebPageVisibilityStateLast),
+    is_focused(false),
+    frame_type(REQUEST_CONTEXT_FRAME_TYPE_LAST) {
+}
+
+ServiceWorkerClientInfo::ServiceWorkerClientInfo(
+    blink::WebPageVisibilityState page_visibility_state,
+    bool is_focused,
+    const GURL& url,
+    RequestContextFrameType frame_type)
+    : client_id(kInvalidServiceWorkerClientId),
+      page_visibility_state(page_visibility_state),
+      is_focused(is_focused),
+      url(url),
+      frame_type(frame_type) {
+}
+
+bool ServiceWorkerClientInfo::IsEmpty() const {
+  return page_visibility_state == blink::WebPageVisibilityStateLast &&
+         is_focused == false &&
+         url.is_empty() &&
+         frame_type == REQUEST_CONTEXT_FRAME_TYPE_LAST;
+}
+
+bool ServiceWorkerClientInfo::IsValid() const {
+  return !IsEmpty() && client_id != kInvalidServiceWorkerClientId;
+}
+
+}  // namespace content