ui + mus: Split ContextFactory into ContextFactory(Client) and ContextFactoryPrivate

content/public/browser/context_factory.h

Index: content/public/browser/context_factory.h
diff --git a/content/public/browser/context_factory.h b/content/public/browser/context_factory.h
index 07f2462279b0499b34ed62b09cce72c9c77e8a22..adcd8a5b989792906a3c4f7105b646636756a886 100644
--- a/content/public/browser/context_factory.h
+++ b/content/public/browser/context_factory.h
@@ -9,6 +9,7 @@
 
 namespace ui {
 class ContextFactory;
+class ContextFactoryPrivate;
 }
 
 namespace content {
@@ -17,6 +18,12 @@ namespace content {
 // owned by content.
 CONTENT_EXPORT ui::ContextFactory* GetContextFactory();
 
+// Returns the singleton ContextFactoryPrivate used by content. The return value
+// is owned by content.
+// TODO(fsamuel): Once Mus is used on all platforms, this private interface
+// should not be necessary.
+CONTENT_EXPORT ui::ContextFactoryPrivate* GetContextFactoryPrivate();
+
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTEXT_FACTORY_H_