AutofillDriverFactory manages information about user gestures

components/autofill/core/browser/autofill_driver_factory.h

Index: components/autofill/core/browser/autofill_driver_factory.h
diff --git a/components/autofill/core/browser/autofill_driver_factory.h b/components/autofill/core/browser/autofill_driver_factory.h
index 8446d7af363b917a9cff21f9647892e9f5c9a78c..ff48bb67ec3df2bb1ca241cd1f6a747a7cf3211d 100644
--- a/components/autofill/core/browser/autofill_driver_factory.h
+++ b/components/autofill/core/browser/autofill_driver_factory.h
@@ -17,11 +17,9 @@ class AutofillClient;
 class AutofillDriver;
 
 // Manages the lifetime of AutofillDrivers for a particular AutofillClient by
-// creating, retrieveing and deleting on demand.
+// creating, notifying, retrieving and deleting on demand.
 class AutofillDriverFactory {
-  // The API is protected to guarantee subclasses that nothing else can
-  // interfere with the map of drivers.
- protected:
+ public:
   explicit AutofillDriverFactory(AutofillClient* client);
 
   ~AutofillDriverFactory();
@@ -30,28 +28,41 @@ class AutofillDriverFactory {
   // null if there is none.
   AutofillDriver* DriverForKey(void* key);
 
-  // Adds a driver, constructed by calling |factory_method|, for |key|. If there
-  // already is a driver for |key|, |factory_method| is not called.
-  void AddForKey(
-      void* key,
-      base::Callback<std::unique_ptr<AutofillDriver>()> factory_method);
-
-  // Deletes the AutofillDriver for |key|.
-  void DeleteForKey(void* key);
-
   // Handles finished navigation in any of the frames.
   void NavigationFinished();
 
   // Handles hiding of the corresponding tab.
   void TabHidden();
 
+  // Call this to notify the factory that one of the frames saw a user gesture.
+  // The factory will distribute this information to all drivers when it comes
+  // for the first time since the last main frame navigation to a different
+  // page. It will also notify drivers added later (see AddForKey).
+  void OnFirstUserGestureObserved();
+
   AutofillClient* client() { return client_; };
 
+ protected:
+  // The API manipulating the drivers map is protected to guarantee subclasses
+  // that nothing else can interfere with the map of drivers.
+
+  // Adds a driver, constructed by calling |factory_method|, for |key|. If there
+  // already is a driver for |key|, |factory_method| is not called. This might
+  // end up notifying the driver that a user gesture has been observed.
+  void AddForKey(
+      void* key,
+      base::Callback<std::unique_ptr<AutofillDriver>()> factory_method);
+
+  // Deletes the AutofillDriver for |key|.
+  void DeleteForKey(void* key);
+
  private:
   AutofillClient* const client_;
 
   std::unordered_map<void*, std::unique_ptr<AutofillDriver>> driver_map_;
 
+  bool user_gesture_seen_ = false;  // The state for OnFirstUserGestureObserved.
+
   DISALLOW_COPY_AND_ASSIGN(AutofillDriverFactory);
 };