Clear Browsing Data hook added and some small tests.

chrome/browser/automation/automation_provider_observers.h

Index: chrome/browser/automation/automation_provider_observers.h
diff --git a/chrome/browser/automation/automation_provider_observers.h b/chrome/browser/automation/automation_provider_observers.h
index fbe8c1552cd6a4ef3f22453316f4475f5703354a..b797960236b930ea25596170d0005f7c6cd0239a 100644
--- a/chrome/browser/automation/automation_provider_observers.h
+++ b/chrome/browser/automation/automation_provider_observers.h
@@ -10,6 +10,7 @@
 #include <set>
 
 #include "chrome/browser/bookmarks/bookmark_model_observer.h"
+#include "chrome/browser/browsing_data_remover.h"
 #include "chrome/browser/download/download_manager.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_registrar.h"
@@ -611,6 +612,22 @@ class AutomationProviderHistoryObserver {
   IPC::Message* reply_message_;
 };
 
+// Allows the automation provider to wait for clearing browser data to finish.
+class AutomationProviderBrowsingDataObserver :
+    public BrowsingDataRemover::Observer {
+ public:
+  AutomationProviderBrowsingDataObserver(
+      AutomationProvider* provider,
+      IPC::Message* reply_message) 
+    : provider_(provider),
+      reply_message_(reply_message) {}
+  void OnBrowsingDataRemoverDone();
+
+ private:
+  AutomationProvider* provider_;
+  IPC::Message* reply_message_;
+};
+
 // Allows automation provider to wait until page load after selecting an item
 // in the omnibox popup.
 class OmniboxAcceptNotificationObserver : public NotificationObserver {