Use an Action Sheet and target the FAB.

Talked with Jon and there are no mocks for what the menu should look like, so I did enough to make the menu work on iPad but that is it. Going to wait until we gets some screens for design to finish the menu but for now this will allow us to continue work.

R=Yuweih@chromium.org

Review-Url: https://codereview.chromium.org/2885103002
Cr-Commit-Position: refs/heads/master@{#473683}

remoting/ios/app/host_view_controller.mm

@@ -207,14 +207,13 @@ static const CGFloat kKeyboardAnimationTime = 0.3;
   // more options. This is not ideal but it gets us an easy way to make a
   // modal window option selector. Replace this with a real menu later.
 
-  UIAlertController* alert =
-      [UIAlertController alertControllerWithTitle:@"Remote Settings"
-                                          message:nil
-                                   preferredStyle:UIAlertControllerStyleAlert];
+  UIAlertController* alert = [UIAlertController
+      alertControllerWithTitle:@"Remote Settings"
+                       message:nil
+                preferredStyle:UIAlertControllerStyleActionSheet];
 
   if ([self isKeyboardActive]) {
     void (^hideKeyboardHandler)(UIAlertAction*) = ^(UIAlertAction*) {
-      NSLog(@"Will hide keyboard.");
       [self hideKeyboard];
     };
     [alert addAction:[UIAlertAction actionWithTitle:@"Hide Keyboard"
@@ -222,7 +221,6 @@ static const CGFloat kKeyboardAnimationTime = 0.3;
                                             handler:hideKeyboardHandler]];
   } else {
     void (^showKeyboardHandler)(UIAlertAction*) = ^(UIAlertAction*) {
-      NSLog(@"Will show keyboard.");
       [self showKeyboard];
     };
     [alert addAction:[UIAlertAction actionWithTitle:@"Show Keyboard"
@@ -251,9 +249,23 @@ static const CGFloat kKeyboardAnimationTime = 0.3;
     [self dismissViewControllerAnimated:YES completion:nil];
   };
   [alert addAction:[UIAlertAction actionWithTitle:@"Disconnect"
-                                            style:UIAlertActionStyleCancel
+                                            style:UIAlertActionStyleDefault
                                           handler:disconnectHandler]];
 
+  void (^cancelHandler)(UIAlertAction*) = ^(UIAlertAction*) {
+    [alert dismissViewControllerAnimated:YES completion:nil];
+  };
+  [alert addAction:[UIAlertAction actionWithTitle:@"Cancel"
+                                            style:UIAlertActionStyleCancel
+                                          handler:cancelHandler]];
+
+  alert.popoverPresentationController.sourceView = self.view;
+  // Target the alert menu at the top middle of the FAB.
+  alert.popoverPresentationController.sourceRect = CGRectMake(
+      _floatingButton.center.x, _floatingButton.frame.origin.y, 1.0, 1.0);
+
+  alert.popoverPresentationController.permittedArrowDirections =
+      UIPopoverArrowDirectionDown;
   [self presentViewController:alert animated:YES completion:nil];
 }