Add the "virtual" keyword on method overrides that are missing it.

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 f6dfaae5cc3708268632efb13c14490fa9d10d95..2411bb9a9ab969ef49a1505e29af1fbcf7be88d5 100644
--- a/chrome/browser/automation/automation_provider_observers.h
+++ b/chrome/browser/automation/automation_provider_observers.h
@@ -770,7 +770,7 @@ class AutomationProviderSearchEngineObserver
     : provider_(provider),
       reply_message_(reply_message) {}
 
-  void OnTemplateURLModelChanged();
+  virtual void OnTemplateURLModelChanged();
 
  private:
   AutomationProvider* provider_;
@@ -806,10 +806,10 @@ class AutomationProviderImportSettingsObserver
       IPC::Message* reply_message)
     : provider_(provider),
       reply_message_(reply_message) {}
-  void ImportStarted() {}
-  void ImportItemStarted(importer::ImportItem item) {}
-  void ImportItemEnded(importer::ImportItem item) {}
-  void ImportEnded();
+  virtual void ImportStarted() {}
+  virtual void ImportItemStarted(importer::ImportItem item) {}
+  virtual void ImportItemEnded(importer::ImportItem item) {}
+  virtual void ImportEnded();
  private:
   AutomationProvider* provider_;
   IPC::Message* reply_message_;
@@ -825,7 +825,7 @@ class AutomationProviderGetPasswordsObserver
     : provider_(provider),
       reply_message_(reply_message) {}
 
-  void OnPasswordStoreRequestDone(
+  virtual void OnPasswordStoreRequestDone(
       int handle, const std::vector<webkit_glue::PasswordForm*>& result);
 
  private:
@@ -842,7 +842,7 @@ class AutomationProviderBrowsingDataObserver
       IPC::Message* reply_message)
     : provider_(provider),
       reply_message_(reply_message) {}
-  void OnBrowsingDataRemoverDone();
+  virtual void OnBrowsingDataRemoverDone();
 
  private:
   AutomationProvider* provider_;