Add missing ui_base_ime dep to views.gyp:views_test_support

Note ui/views/BUILD.gn actually has it already.

views_unittests compile regressed in r314860

It's only a problem for toolkit-views on Mac because it doesn't depend
on aura_test_support there (which also has the dependency).
views_test_support should have it for the call to
ui::{Initialize,Shutdown}InputMethodForTesting() in ViewsTestBase.

BUG=378134

Review URL: https://codereview.chromium.org/895343004

Cr-Commit-Position: refs/heads/master@{#315166}

ui/views/views.gyp

@@ -730,6 +730,7 @@
         '../../ipc/ipc.gyp:test_support_ipc',
         '../../skia/skia.gyp:skia',
         '../../testing/gtest.gyp:gtest',
+        '../base/ime/ui_base_ime.gyp:ui_base_ime',
         '../base/ui_base.gyp:ui_base',
         '../compositor/compositor.gyp:compositor',
         '../compositor/compositor.gyp:compositor_test_support',