Revert 253010 "Revert 251563 "Move browser initiated navigation ..."

Looks like it wasn't responsible, and we've re-landed r249676 as well.

> Revert 251563 "Move browser initiated navigation from RenderView..."
> 
> Speculatively revert to help diagnose bug 345757.
> Mainly useful to make it easier to revert r249676, which changes the
> lifetime of RenderViewHosts.
> 
> > Move browser initiated navigation from RenderViewHost to RenderFrameHost.
> > 
> > BUG=304341
> > [email protected]
> > 
> > Review URL: https://codereview.chromium.org/148083013
> 
> [email protected]
> 
> Review URL: https://codereview.chromium.org/177713006

[email protected], [email protected]

Review URL: https://codereview.chromium.org/181113009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254174 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/common/frame_message_enums.h b/content/common/frame_message_enums.h
new file mode 100644
index 0000000..d2f9d8a
--- /dev/null
+++ b/content/common/frame_message_enums.h
@@ -0,0 +1,40 @@
+// Copyright 2014 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 CONTENT_COMMON_FRAME_MESSAGES_ENUMS_H_
+#define CONTENT_COMMON_FRAME_MESSAGES_ENUMS_H_
+
+#include "ipc/ipc_message_macros.h"
+
+struct FrameMsg_Navigate_Type {
+ public:
+  enum Value {
+    // Reload the page.
+    RELOAD,
+
+    // Reload the page, ignoring any cache entries.
+    RELOAD_IGNORING_CACHE,
+
+    // Reload the page using the original request URL.
+    RELOAD_ORIGINAL_REQUEST_URL,
+
+    // The navigation is the result of session restore and should honor the
+    // page's cache policy while restoring form state. This is set to true if
+    // restoring a tab/session from the previous session and the previous
+    // session did not crash. If this is not set and the page was restored then
+    // the page's cache policy is ignored and we load from the cache.
+    RESTORE,
+
+    // Like RESTORE, except that the navigation contains POST data.
+    RESTORE_WITH_POST,
+
+    // Navigation type not categorized by the other types.
+    NORMAL,
+
+    // Last guard value, so we can use it for validity checks.
+    NAVIGATE_TYPE_LAST = NORMAL,
+  };
+};
+
+#endif  // CONTENT_COMMON_FRAME_MESSAGES_ENUMS_H_