Move topSites API out of experimental

chrome/browser/history/history_extension_api.h

Index: chrome/browser/history/history_extension_api.h
diff --git a/chrome/browser/history/history_extension_api.h b/chrome/browser/history/history_extension_api.h
index e66ea76882ed063d6a6119c07cd09246fffe799f..d6b26d306646ff28bb05fa7ec05c9269b04115fa 100644
--- a/chrome/browser/history/history_extension_api.h
+++ b/chrome/browser/history/history_extension_api.h
@@ -137,4 +137,17 @@ class DeleteRangeHistoryFunction : public HistoryFunctionWithCallback {
   void DeleteComplete();
 };
 
+class GetMostVisitedHistoryFunction : public HistoryFunctionWithCallback {
+ public:
+  virtual bool RunAsyncImpl() OVERRIDE;
+  DECLARE_EXTENSION_FUNCTION_NAME("history.getMostVisited");
+
+  // Callback for QueryMostVisitedURLs.
+  void QueryComplete(CancelableRequestProvider::Handle handle,
+                     history::MostVisitedURLList pages);
+
+  // We need a consumer for QueryMostVisitedURLs.
+  CancelableRequestConsumer history_consumer_;
+};
+
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_EXTENSION_API_H_