Force U.S. English keyboard layout for TextfieldTest.KeysWithModifiersTest

ui/events/test/keyboard_layout_mac.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/events/test/keyboard_layout.h"
+
+#include "base/logging.h"
+
+namespace ui {
+
+PlatformKeyboardLayout GetPlatformKeyboardLayout(KeyboardLayout layout) {
+  DCHECK_EQ(layout, KEYBOARD_LAYOUT_ENGLISH_US);

[Peter Kasting, 2016/08/31 21:16:15]

Nit: (expected, actual)

You might want a comment that says something like "Right now tests only need US
English.  If other layouts need to be supported in the future this code should
be extended."

+  const char input_source_id[] = "com.apple.keylayout.US";
+
+  base::ScopedCFTypeRef<CFMutableDictionaryRef> filter_dict(
+      CFDictionaryCreateMutable(kCFAllocatorDefault, 1,
+                                &kCFTypeDictionaryKeyCallBacks,
+                                &kCFTypeDictionaryValueCallBacks));
+  base::ScopedCFTypeRef<CFStringRef> id_ref(CFStringCreateWithCString(
+      kCFAllocatorDefault, input_source_id, kCFStringEncodingUTF8));
+  CFDictionaryAddValue(filter_dict, kTISPropertyInputSourceID, id_ref);
+  base::ScopedCFTypeRef<CFArrayRef> sources(
+      TISCreateInputSourceList(filter_dict, true));
+  if (CFArrayGetCount(sources) != 1)
+    return PlatformKeyboardLayout();
+
+  return PlatformKeyboardLayout(
+      (TISInputSourceRef)CFArrayGetValueAtIndex(sources, 0));
+}
+
+PlatformKeyboardLayout ScopedKeyboardLayout::GetActiveLayout() {
+  return PlatformKeyboardLayout(TISCopyCurrentKeyboardInputSource());
+}
+
+bool ScopedKeyboardLayout::ActivateLayout(PlatformKeyboardLayout layout) {
+  DCHECK(layout);
+  return TISSelectInputSource(layout) == noErr;
+}
+
+}  // namespace ui