FBTF: Move a bunch of code to the headers and remove includes.

chrome/browser/automation/automation_extension_tracker.h

Index: chrome/browser/automation/automation_extension_tracker.h
diff --git a/chrome/browser/automation/automation_extension_tracker.h b/chrome/browser/automation/automation_extension_tracker.h
index 8daaf7fb05bdfca2eb38e9bdeeb7ebad737bb3a1..c1b7ed77908ba72e38d845665cc5f3eeb80fc759 100644
--- a/chrome/browser/automation/automation_extension_tracker.h
+++ b/chrome/browser/automation/automation_extension_tracker.h
@@ -23,10 +23,10 @@ class AutomationExtensionTracker
   // extension, is the one who sends the notification about extension
   // uninstalls. Instead of using this method, one observer is added for all
   // extensions in the constructor.
-  virtual void AddObserver(Extension* resource) {}
+  virtual void AddObserver(Extension* resource);
 
   // See related comment above as to why this method is empty.
-  virtual void RemoveObserver(Extension* resource) {}
+  virtual void RemoveObserver(Extension* resource);
 
   // Overriding AutomationResourceTracker Observe. AutomationResourceTracker's
   // Observe expects the NotificationSource to be the object that is closing.