Adding "Clear hosted app data" checkbox to browsing data removal UI.

chrome/browser/ui/webui/options2/clear_browser_data_handler2.h

Index: chrome/browser/ui/webui/options2/clear_browser_data_handler2.h
diff --git a/chrome/browser/ui/webui/options2/clear_browser_data_handler2.h b/chrome/browser/ui/webui/options2/clear_browser_data_handler2.h
index 9e5481209a3a3f8d76fe23f1873a5c7b589e8d95..aaaa13b6a13a1acb01879b074fd49bfadf8e6d26 100644
--- a/chrome/browser/ui/webui/options2/clear_browser_data_handler2.h
+++ b/chrome/browser/ui/webui/options2/clear_browser_data_handler2.h
@@ -33,6 +33,10 @@ class ClearBrowserDataHandler : public OptionsPageUIHandler,
   // Callback from BrowsingDataRemover. Closes the dialog.
   virtual void OnBrowsingDataRemoverDone() OVERRIDE;
 
+  // Clears the data of hosted apps, which is usually protected from deletion

[markusheintz_, 2012/06/04 14:50:52]

nit: Does "usually" mean:
A) always protected
B) sometimes protected and sometimes not.

In case of A please delete "usually"
In case of B please document when it is protected and when not. 

[Mike West, 2012/06/05 08:55:02]

Changed to "otherwise", which I think makes things more clear. The data is
protected from deletion, unless Clear Hosted App Data is called.

+  // when the user clears regular browsing data.
+  void HandleClearHostedAppData();
+
   // If non-null it means removal is in progress. BrowsingDataRemover takes care
   // of deleting itself when done.
   BrowsingDataRemover* remover_;
@@ -40,6 +44,10 @@ class ClearBrowserDataHandler : public OptionsPageUIHandler,
   // Keeps track of whether clearing LSO data is supported.
   BooleanPrefMember clear_plugin_lso_data_enabled_;
 
+  // Indicates that we also need to delete hosted app data after finishing the
+  // first removal operation.
+  bool remove_hosted_app_data_pending_;
+
   DISALLOW_COPY_AND_ASSIGN(ClearBrowserDataHandler);
 };