Simplify the support string in the Clear Browsing Data dialog.

chrome/browser/ui/webui/options/clear_browser_data_handler.h

Index: chrome/browser/ui/webui/options/clear_browser_data_handler.h
diff --git a/chrome/browser/ui/webui/options/clear_browser_data_handler.h b/chrome/browser/ui/webui/options/clear_browser_data_handler.h
index 7ffe94918f669dd62fe49ba008a5ffbddebb85d5..bb6f014d9b68c74cb89a9d7b7e01c068dee9a844 100644
--- a/chrome/browser/ui/webui/options/clear_browser_data_handler.h
+++ b/chrome/browser/ui/webui/options/clear_browser_data_handler.h
@@ -9,13 +9,15 @@
 #include "base/prefs/pref_member.h"
 #include "chrome/browser/browsing_data/browsing_data_counter.h"
 #include "chrome/browser/browsing_data/browsing_data_remover.h"
+#include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
 
 namespace options {
 
 // Clear browser data handler page UI handler.
 class ClearBrowserDataHandler : public OptionsPageUIHandler,
-                                public BrowsingDataRemover::Observer {
+                                public BrowsingDataRemover::Observer,
+                                public sync_driver::SyncServiceObserver {
  public:
   ClearBrowserDataHandler();
   ~ClearBrowserDataHandler() override;
@@ -54,6 +56,10 @@ class ClearBrowserDataHandler : public OptionsPageUIHandler,
                          bool finished,
                          uint32 count);
 
+  // Called when the Sync service state changes. Updates the support string

[Bernhard Bauer, 2015/09/26 06:46:07]

Mention which interface this method implements? Then you don't have to mention
when the method is called, as that should be the comment for the pure virtual
method in the interface (but you can keep the comment that says what this
particular implementation does).

[msramek, 2015/09/28 08:41:42]

Done.

+  // at the bottom of the dialog.
+  void OnStateChanged() override;
+
   // If non-null it means removal is in progress. BrowsingDataRemover takes care
   // of deleting itself when done.
   BrowsingDataRemover* remover_;
@@ -71,6 +77,9 @@ class ClearBrowserDataHandler : public OptionsPageUIHandler,
   // Counters that calculate the data volume for some of the data types.
   ScopedVector<BrowsingDataCounter> counters_;
 
+  // Informs us whether the user is syncing their data.
+  ProfileSyncService* sync_service_;
+
   DISALLOW_COPY_AND_ASSIGN(ClearBrowserDataHandler);
 };