Upstream Chrome on iOS source code [4/11].

ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.mm

Index: ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.mm
diff --git a/ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.mm b/ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.mm
new file mode 100644
index 0000000000000000000000000000000000000000..2e2708e49800b482fcb32f5de048ca3732d86412
--- /dev/null
+++ b/ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.mm
@@ -0,0 +1,78 @@
+// 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.
+
+#import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
+
+#include "ios/web/public/web_thread.h"
+
+@implementation MDCPalette (CrAdditions)
+
+namespace {
+static MDCPalette* g_bluePalette = nil;
+static MDCPalette* g_redPalette = nil;
+static MDCPalette* g_greenPalette = nil;
+static MDCPalette* g_yellowPalette = nil;
+}
+
++ (MDCPalette*)cr_bluePalette {
+  DCHECK(!web::WebThread::IsThreadInitialized(web::WebThread::UI) ||
+         web::WebThread::CurrentlyOn(web::WebThread::UI));
+  if (!g_bluePalette)
+    return [MDCPalette bluePalette];
+  return g_bluePalette;
+}
+
++ (MDCPalette*)cr_redPalette {
+  DCHECK(!web::WebThread::IsThreadInitialized(web::WebThread::UI) ||
+         web::WebThread::CurrentlyOn(web::WebThread::UI));
+  if (!g_redPalette)
+    return [MDCPalette redPalette];
+  return g_redPalette;
+}
+
++ (MDCPalette*)cr_greenPalette {
+  DCHECK(!web::WebThread::IsThreadInitialized(web::WebThread::UI) ||
+         web::WebThread::CurrentlyOn(web::WebThread::UI));
+  if (!g_greenPalette)
+    return [MDCPalette greenPalette];
+  return g_greenPalette;
+}
+
++ (MDCPalette*)cr_yellowPalette {
+  DCHECK(!web::WebThread::IsThreadInitialized(web::WebThread::UI) ||
+         web::WebThread::CurrentlyOn(web::WebThread::UI));
+  if (!g_yellowPalette)
+    return [MDCPalette yellowPalette];
+  return g_yellowPalette;
+}
+
++ (void)cr_setBluePalette:(MDCPalette*)palette {
+  DCHECK(!web::WebThread::IsThreadInitialized(web::WebThread::UI) ||
+         web::WebThread::CurrentlyOn(web::WebThread::UI));
+  [g_bluePalette autorelease];
+  g_bluePalette = [palette retain];
+}
+
++ (void)cr_setRedPalette:(MDCPalette*)palette {
+  DCHECK(!web::WebThread::IsThreadInitialized(web::WebThread::UI) ||
+         web::WebThread::CurrentlyOn(web::WebThread::UI));
+  [g_redPalette autorelease];
+  g_redPalette = [palette retain];
+}
+
++ (void)cr_setGreenPalette:(MDCPalette*)palette {
+  DCHECK(!web::WebThread::IsThreadInitialized(web::WebThread::UI) ||
+         web::WebThread::CurrentlyOn(web::WebThread::UI));
+  [g_greenPalette autorelease];
+  g_greenPalette = [palette retain];
+}
+
++ (void)cr_setYellowPalette:(MDCPalette*)palette {
+  DCHECK(!web::WebThread::IsThreadInitialized(web::WebThread::UI) ||
+         web::WebThread::CurrentlyOn(web::WebThread::UI));
+  [g_yellowPalette autorelease];
+  g_yellowPalette = [palette retain];
+}
+
+@end