Remove useless FaviconHandler::PageChangedSinceFaviconWasRequested()

components/favicon/core/favicon_driver.h

Index: components/favicon/core/favicon_driver.h
diff --git a/components/favicon/core/favicon_driver.h b/components/favicon/core/favicon_driver.h
index 977f5aa0d788d8fbd227a6e69c80c1cd6ded1787..29a056a3f079cd627295419d5d59c08cefaa20c5 100644
--- a/components/favicon/core/favicon_driver.h
+++ b/components/favicon/core/favicon_driver.h
@@ -65,15 +65,14 @@ class FaviconDriver {
   virtual GURL GetActiveURL() = 0;
 
   // Returns whether the page's favicon is valid (returns false if the default
-  // favicon is being used). Requires GetActiveURL() to be valid.
+  // favicon is being used).
   virtual bool GetActiveFaviconValidity() = 0;
 
   // Sets whether the page's favicon is valid (if false, the default favicon is
   // being used).
   virtual void SetActiveFaviconValidity(bool valid) = 0;
 
-  // Returns the URL of the current page's favicon. Requires GetActiveURL() to
-  // be valid.
+  // Returns the URL of the current page's favicon.
   virtual GURL GetActiveFaviconURL() = 0;
 
   // Sets the URL of the favicon's bitmap.
@@ -82,6 +81,10 @@ class FaviconDriver {
   // Sets the bitmap of the current page's favicon.
   virtual void SetActiveFaviconImage(const gfx::Image& image) = 0;
 
+  // Returns whether any notifications should be sent when a favicon image is
+  // available.
+  virtual bool ShouldSendFaviconAvailableNotifications() = 0;
+
   // Notifies the driver a favicon image is available. |image| is not
   // necessarily 16x16. |icon_url| is the url the image is from. If
   // |is_active_favicon| is true the image corresponds to the favicon