<webview>: Partially migrate loadcommit event from content to chrome

chrome/browser/adview/adview_constants.cc

Index: chrome/browser/adview/adview_constants.cc
diff --git a/chrome/browser/adview/adview_constants.cc b/chrome/browser/adview/adview_constants.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bb25eff38577fde3d2b7a284f039f80fd8f373a5
--- /dev/null
+++ b/chrome/browser/adview/adview_constants.cc
@@ -0,0 +1,19 @@
+// Copyright 2013 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 "chrome/browser/adview/adview_constants.h"
+
+namespace adview_constants {
+
+// Events.
+const char kEventLoadCommit[] = "adview.onLoadCommit";
+
+// Parameters/properties on events.
+const char kIsTopLevel[] = "isTopLevel";
+const char kUrl[] = "url";
+
+// Attributes.
+const char kAttributeApi[] = "api";
+
+}  // namespace adview_constants