Make Autofill work again on iPads running iOS 9.

ios/chrome/browser/autofill/form_input_accessory_view.mm

Index: ios/chrome/browser/autofill/form_input_accessory_view.mm
diff --git a/ios/chrome/browser/autofill/form_input_accessory_view.mm b/ios/chrome/browser/autofill/form_input_accessory_view.mm
index a794ab43e4d2b5ab64b61d4012cc65aff8c783be..815c355e90abce92fa1f4baeda3db0f0f5b84abc 100644
--- a/ios/chrome/browser/autofill/form_input_accessory_view.mm
+++ b/ios/chrome/browser/autofill/form_input_accessory_view.mm
@@ -118,6 +118,20 @@ CGFloat GetNavigationViewWidth() {
   return self;
 }
 
+- (instancetype)initWithFrame:(CGRect)frame customView:(UIView*)customView {
+  self = [super initWithFrame:frame];
+  if (self) {
+    _customView.reset([customView retain]);

[justincohen, 2015/08/19 20:34:19]

Why do we retain this at all

[Justin Donnelly, 2015/08/20 16:38:01]

Don't know. My quick guess would be that something in here used to communicate
with the view but no longer does. How about I circle back around to this in
another CL. I'd prefer to touch as little as possible here.

+    customView.frame =
+        CGRectMake(0, 0, CGRectGetWidth(frame), CGRectGetHeight(frame));
+    [self addSubview:customView];
+
+    [[self class] addBackgroundImageInView:self
+                             withImageName:@"autofill_keyboard_background"];
+  }
+  return self;
+}
+
 #pragma mark -
 #pragma mark UIInputViewAudioFeedback