Move AccessTokenStore to Content API, now that it is a pure-virtual class.

content/public/browser/access_token_store.cc

Index: content/public/browser/access_token_store.cc
diff --git a/content/browser/geolocation/access_token_store.cc b/content/public/browser/access_token_store.cc
similarity index 71%
rename from content/browser/geolocation/access_token_store.cc
rename to content/public/browser/access_token_store.cc
index 5345661be3420cd92b66df7d309e6ba007ca1508..ba563f4e8a4eeacff3467d473d928c3e53e029a1 100644
--- a/content/browser/geolocation/access_token_store.cc
+++ b/content/public/browser/access_token_store.cc
@@ -2,10 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "content/browser/geolocation/access_token_store.h"
+#include "content/public/browser/access_token_store.h"
+
+namespace content {
 
 AccessTokenStore::AccessTokenStore() {
 }
 
 AccessTokenStore::~AccessTokenStore() {
 }
+
+}  // namespace content