Create GoogleURLTrackerClient interface and //chrome implementation

chrome/browser/google/google_url_tracker_navigation_helper.h

Index: chrome/browser/google/google_url_tracker_navigation_helper.h
diff --git a/chrome/browser/google/google_url_tracker_navigation_helper.h b/chrome/browser/google/google_url_tracker_navigation_helper.h
index f48e6f0974c56cf7943af6f798001ae528c7c8cd..26b7a5348762a03183fa1147e7fcec73aa292250 100644
--- a/chrome/browser/google/google_url_tracker_navigation_helper.h
+++ b/chrome/browser/google/google_url_tracker_navigation_helper.h
@@ -19,17 +19,9 @@ class GoogleURLTrackerNavigationHelper {
  public:
   virtual ~GoogleURLTrackerNavigationHelper() {}
 
-  // Sets the GoogleURLTracker that should receive callbacks from this observer.
+  // Sets the GoogleURLTracker that is associated with this object.
   virtual void SetGoogleURLTracker(GoogleURLTracker* tracker) = 0;
 
-  // Enables or disables listening for navigation starts. OnNavigationPending
-  // will be called for each navigation start if listening is enabled.
-  virtual void SetListeningForNavigationStart(bool listen) = 0;
-
-  // Returns whether or not the observer is currently listening for navigation
-  // starts.
-  virtual bool IsListeningForNavigationStart() = 0;
-
   // Enables or disables listening for navigation commits for the given
   // NavigationController. OnNavigationCommitted will be called for each
   // navigation commit if listening is enabled.