Roll material_components_ios to 3ac6d0ff2ac5

Adding MDCAlertControllerView.

Bug: 823767
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I219d7dbbac4f0fb6dd6b7cdfa51890f35e696e2c
Reviewed-on: https://chromium-review.googlesource.com/973203Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Olivier Robin <olivierrobin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#544757}

DEPS

@@ -210,7 +210,7 @@ deps = {
   },
 
   'src/ios/third_party/material_components_ios/src': {
-      'url': Var('chromium_git') + '/external/github.com/material-components/material-components-ios.git' + '@' + 'dd21af4fef24ddb42d39e9610b84109273c50899',
+      'url': Var('chromium_git') + '/external/github.com/material-components/material-components-ios.git' + '@' + '3ac6d0ff2ac59613b12f3278a2ca36f43692ad8c',
       'condition': 'checkout_ios',
   },
 

ios/third_party/material_components_ios/BUILD.gn

@@ -137,6 +137,7 @@ source_set("material_components_ios") {
     "src/components/Dialogs/src/ColorThemer/MDCAlertColorThemer.m",
     "src/components/Dialogs/src/MDCAlertController.h",
     "src/components/Dialogs/src/MDCAlertController.m",
+    "src/components/Dialogs/src/MDCAlertControllerView.h",
     "src/components/Dialogs/src/MDCDialogPresentationController.h",
     "src/components/Dialogs/src/MDCDialogPresentationController.m",
     "src/components/Dialogs/src/MDCDialogTransitionController.h",
@@ -144,6 +145,8 @@ source_set("material_components_ios") {
     "src/components/Dialogs/src/MaterialDialogs.h",
     "src/components/Dialogs/src/UIViewController+MaterialDialogs.h",
     "src/components/Dialogs/src/UIViewController+MaterialDialogs.m",
+    "src/components/Dialogs/src/private/MDCAlertControllerView+Private.h",
+    "src/components/Dialogs/src/private/MDCAlertControllerView+Private.m",
     "src/components/Dialogs/src/private/MDCDialogShadowedView.h",
     "src/components/Dialogs/src/private/MDCDialogShadowedView.m",
     "src/components/Dialogs/src/private/MaterialDialogsStrings.h",