Fix for iPads running iOS 9 to no longer crash on pw generation.

ios/chrome/browser/autofill/form_input_accessory_view_controller.mm

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/autofill/form_input_accessory_view_controller.h"
 
 #include "base/ios/block_types.h"
 #include "base/ios/ios_util.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_block.h"
@@ skipping 272 matching lines @@
   }
 }
 
 - (void)showCustomInputAccessoryView:(UIView*)view {
   DCHECK(view);
   if (base::ios::IsRunningOnIOS9OrLater() && IsIPadIdiom()) {
     // On iPads running iOS 9 or later, there's no inputAccessoryView available
     // so we attach the custom view directly to the keyboard view instead.
     [_customAccessoryView removeFromSuperview];
 
-    // If the keyboard isn't visible or no suggestions have been triggered yet,
-    // don't show the custom view.
-    int numSuggestions =
-        [[static_cast<FormSuggestionView*>(view) suggestions] count];
+    // If the keyboard isn't visible don't show the custom view.
     if (CGRectIntersection([UIScreen mainScreen].bounds, _keyboardFrame)
                 .size.height == 0 ||
-        CGRectEqualToRect(_keyboardFrame, CGRectZero) ||
-        (!_suggestionsHaveBeenShown && numSuggestions == 0)) {
+        CGRectEqualToRect(_keyboardFrame, CGRectZero)) {
       _customAccessoryView.reset();
       return;
     }
+
+    // If this is a form suggestion view and no suggestions have been triggered
+    // yet, don't show the custom view.
+    FormSuggestionView* formSuggestionView =
+        base::mac::ObjCCastStrict<FormSuggestionView>(view);
+    if (formSuggestionView) {
+      int numSuggestions = [[formSuggestionView suggestions] count];
+      if (!_suggestionsHaveBeenShown && numSuggestions == 0) {
+        _customAccessoryView.reset();
+        return;
+      }
+    }
     _suggestionsHaveBeenShown = YES;
 
     CGFloat height = autofill::kInputAccessoryHeight;
     CGRect frame = CGRectMake(_keyboardFrame.origin.x, -height,
                               _keyboardFrame.size.width, height);
     _customAccessoryView.reset(
         [[FormInputAccessoryView alloc] initWithFrame:frame customView:view]);
     UIView* keyboardView = [self getKeyboardView];
     DCHECK(keyboardView);
     [keyboardView addSubview:_customAccessoryView];
@@ skipping 274 matching lines @@
 // that we don't present our custom view over the keyboard.
 - (void)textInputDidBeginEditing:(NSNotification*)notification {
   [self reset];
 }
 
 - (void)keyboardDidHide:(NSNotification*)notification {
   _keyboardFrame = CGRectZero;
 }
 
 @end