Add a fake cursor (blinking UIView) to the widget extension.

ios/chrome/widget_extension/widget_view_controller.mm

Index: ios/chrome/widget_extension/widget_view_controller.mm
diff --git a/ios/chrome/widget_extension/widget_view_controller.mm b/ios/chrome/widget_extension/widget_view_controller.mm
index dfe050a6a5c0766cc0e7d3564151b35788ff1729..df2c1b44a16ad2299d88919fd485f249b8536ce7 100644
--- a/ios/chrome/widget_extension/widget_view_controller.mm
+++ b/ios/chrome/widget_extension/widget_view_controller.mm
@@ -12,7 +12,7 @@
 #error "This file requires ARC support."
 #endif
 
-@interface WidgetViewController ()
+@interface WidgetViewController ()<NCWidgetProviding>

[Olivier, 2017/01/19 10:33:07]

Do you use anything from this protocol?

[lody, 2017/01/19 13:17:55]

hmm, not yet. I was experimenting. I'll remove it for this CL.

 @property(nonatomic, weak) WidgetView* widgetView;
 @end
 
@@ -30,6 +30,18 @@
   WidgetView* widgetView = [[WidgetView alloc] init];
   self.widgetView = widgetView;
   [self.view addSubview:self.widgetView];
+
+  [self.widgetView setTranslatesAutoresizingMaskIntoConstraints:NO];
+  [NSLayoutConstraint activateConstraints:@[
+    [self.widgetView.leadingAnchor
+        constraintEqualToAnchor:[self.view leadingAnchor]],
+    [self.widgetView.trailingAnchor
+        constraintEqualToAnchor:[self.view trailingAnchor]],
+    [self.widgetView.heightAnchor
+        constraintEqualToAnchor:[self.view heightAnchor]],
+    [self.widgetView.widthAnchor
+        constraintEqualToAnchor:[self.view widthAnchor]]
+  ]];
 }
 
 @end