[MDC roll] Roll Material Components to 6b263c923868dd7d74aad2509d5b1863abf11ef2

Tracking:
src/components/ButtonBar/src/ColorThemer/MDCButtonBarColorThemer.h
src/components/ButtonBar/src/ColorThemer/MDCButtonBarColorThemer.m
src/components/ButtonBar/src/MDCButtonBarButton.h
src/components/ButtonBar/src/private/MDCButtonBarButton+Private.h
src/components/ButtonBar/src/private/MDCButtonBarButton.m


Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I4e77cf843916da31fb574993729a37137b05bb23
Reviewed-on: https://chromium-review.googlesource.com/897863Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534190}

DEPS

@@ -201,7 +201,7 @@ deps = {
   },
 
   'src/ios/third_party/material_components_ios/src': {
-      'url': Var('chromium_git') + '/external/github.com/material-components/material-components-ios.git' + '@' + 'b616332660ecbc671de56fa30f6cc7a9d3b6a547',
+      'url': Var('chromium_git') + '/external/github.com/material-components/material-components-ios.git' + '@' + '6b263c923868dd7d74aad2509d5b1863abf11ef2',
       'condition': 'checkout_ios',
   },
 

ios/third_party/material_components_ios/BUILD.gn

@@ -79,11 +79,16 @@ source_set("material_components_ios") {
     "src/components/BottomSheet/src/private/MDCDraggableView.m",
     "src/components/BottomSheet/src/private/MDCSheetContainerView.h",
     "src/components/BottomSheet/src/private/MDCSheetContainerView.m",
+    "src/components/ButtonBar/src/ColorThemer/MDCButtonBarColorThemer.h",
+    "src/components/ButtonBar/src/ColorThemer/MDCButtonBarColorThemer.m",
     "src/components/ButtonBar/src/MDCButtonBar.h",
     "src/components/ButtonBar/src/MDCButtonBar.m",
+    "src/components/ButtonBar/src/MDCButtonBarButton.h",
     "src/components/ButtonBar/src/MaterialButtonBar.h",
     "src/components/ButtonBar/src/private/MDCAppBarButtonBarBuilder.h",
     "src/components/ButtonBar/src/private/MDCAppBarButtonBarBuilder.m",
+    "src/components/ButtonBar/src/private/MDCButtonBarButton+Private.h",
+    "src/components/ButtonBar/src/private/MDCButtonBarButton.m",
     "src/components/Buttons/src/MDCButton.h",
     "src/components/Buttons/src/MDCButton.m",
     "src/components/Buttons/src/MDCFlatButton.h",