athena: Use mojo to provide the bindings for the virtual keyboard.

ui/keyboard/keyboard.cc

Index: ui/keyboard/keyboard.cc
diff --git a/ui/keyboard/keyboard.cc b/ui/keyboard/keyboard.cc
index 436b93595f925ec97be82f1ee69b977330e615a5..2d4de139ddcd316a57d6f7ed13dec0494ddfb30c 100644
--- a/ui/keyboard/keyboard.cc
+++ b/ui/keyboard/keyboard.cc
@@ -7,6 +7,7 @@
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/keyboard/webui/vk_webui_controller.h"
 
 namespace keyboard {
 
@@ -29,4 +30,17 @@ void InitializeKeyboard() {
       pak_file, ui::SCALE_FACTOR_100P);
 }
 
+void InitializeWebUIBindings() {
+  CHECK(initialized);
+  base::FilePath content_resources;
+  DCHECK(PathService::Get(base::DIR_MODULE, &content_resources));
+  content_resources =
+      content_resources.Append(FILE_PATH_LITERAL("content_resources.pak"));
+  ui::ResourceBundle::GetSharedInstance().AddDataPackFromPath(
+      content_resources, ui::SCALE_FACTOR_100P);
+
+  content::WebUIControllerFactory::RegisterFactory(
+      VKWebUIControllerFactory::GetInstance());
+}
+
 }  // namespace keyboard