Wrap selector logic in try..except statement

This catches all errors that are thrown, when any
`find_element_by_*` method fails for some reason.
If this happens, we just fall through and wait for
a page refresh and then try again.

deletefb/deletefb.py

@@ -103,27 +103,30 @@ def delete_posts(user_email_address,
     driver.get(user_profile_url)
 
     for _ in range(MAX_POSTS):
-        post_button_sel = "_4xev"
-        timeline_element = driver.find_element_by_class_name(post_button_sel)
-        actions = ActionChains(driver)
-        actions.move_to_element(timeline_element).click().perform()
+        try:
+            post_button_sel = "_4xev"
+            timeline_element = driver.find_element_by_class_name(post_button_sel)
+            actions = ActionChains(driver)
+            actions.move_to_element(timeline_element).click().perform()
 
-        menu = driver.find_element_by_css_selector("#globalContainer > div.uiContextualLayerPositioner.uiLayer > div")
-        actions.move_to_element(menu).perform()
+            menu = driver.find_element_by_css_selector("#globalContainer > div.uiContextualLayerPositioner.uiLayer > div")
+            actions.move_to_element(menu).perform()
 
-        try:
-            delete_button = menu.find_element_by_xpath("//a[@data-feed-option-name=\"FeedDeleteOption\"]")
+            try:
+                delete_button = menu.find_element_by_xpath("//a[@data-feed-option-name=\"FeedDeleteOption\"]")
 
-        # FIXME Using a bare except here to avoid having to handle all possible exceptions
-        except:
-            delete_button = menu.find_element_by_xpath("//a[@data-feed-option-name=\"HIDE_FROM_TIMELINE\"]")
+            # FIXME Using a bare except here to avoid having to handle all possible exceptions
+            except:
+                delete_button = menu.find_element_by_xpath("//a[@data-feed-option-name=\"HIDE_FROM_TIMELINE\"]")
 
-        actions.move_to_element(delete_button).click().perform()
+            actions.move_to_element(delete_button).click().perform()
 
-        confirmation_button = driver.find_element_by_class_name("layerConfirm")
+            confirmation_button = driver.find_element_by_class_name("layerConfirm")
 
-        # Facebook would not let me get focus on this button without some custom JS
-        driver.execute_script("arguments[0].click();", confirmation_button)
+            # Facebook would not let me get focus on this button without some custom JS
+            driver.execute_script("arguments[0].click();", confirmation_button)
+        except:
+            pass
 
         # Required to sleep the thread for a bit after using JS to click this button
         time.sleep(5)