Refactor FrameLoader loading interface

public/web/WebFrameLoadType.h

Index: public/web/WebFrameLoadType.h
diff --git a/public/web/WebFrameLoadType.h b/public/web/WebFrameLoadType.h
new file mode 100644
index 0000000000000000000000000000000000000000..31389275951f92d56b215a0484804293786b8b1b
--- /dev/null
+++ b/public/web/WebFrameLoadType.h
@@ -0,0 +1,28 @@
+// 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.
+
+#ifndef WebFrameLoadType_h
+#define WebFrameLoadType_h
+
+
+namespace blink {
+
+// The type of load for a navigation.
+// TODO(clamy): Return a WebFrameLoadType instead of a WebHistoryCommitType
+// in DidCommitProvisionalLoad.
+enum class WebFrameLoadType {
+    Standard,
+    BackForward,
+    Reload,
+    Same, // user loads same URL again (but not reload button)
+    RedirectWithLockedBackForwardList,
+    InitialInChildFrame,
+    InitialHistoryLoad, // history navigation in a newly created frame
+    ReloadFromOrigin, // reload bypassing cache
+};
+
+} // namespace blink
+
+#endif // WebFrameLoadType_h
+