Adds deep link util for Assistant.

Placed the util in ash::assistant::util.
Follow up CLs will handle the deep links.

Bug: b:110433859
Change-Id: Ie554bd1a8c3d3acfab6d73697b2bbee9522b4c35
Reviewed-on: https://chromium-review.googlesource.com/1115506Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Commit-Queue: David Black <dmblack@google.com>
Cr-Commit-Position: refs/heads/master@{#571291}

ash/BUILD.gn

@@ -136,6 +136,8 @@ component("ash") {
     "assistant/ui/main_stage/suggestion_container_view.h",
     "assistant/ui/main_stage/ui_element_container_view.cc",
     "assistant/ui/main_stage/ui_element_container_view.h",
+    "assistant/util/deep_link_util.cc",
+    "assistant/util/deep_link_util.h",
     "autoclick/autoclick_controller.cc",
     "autoclick/autoclick_controller.h",
     "cancel_mode.cc",

ash/assistant/assistant_controller.cc

@@ -6,6 +6,7 @@
 
 #include "ash/assistant/assistant_interaction_controller.h"
 #include "ash/assistant/assistant_ui_controller.h"
+#include "ash/assistant/util/deep_link_util.h"
 #include "ash/new_window_controller.h"
 #include "ash/session/session_controller.h"
 #include "ash/shell.h"
@@ -156,9 +157,14 @@ void AssistantController::OnOpenUrlFromTab(const GURL& url) {
 }
 
 void AssistantController::OpenUrl(const GURL& url) {
-  Shell::Get()->new_window_controller()->NewTabWithUrl(url);
+  if (assistant::util::IsDeepLinkUrl(url)) {
+    // TODO(dmblack): Handle deep links.
+    NOTIMPLEMENTED();
+    return;
+  }
 
   // We dismiss Assistant UI when opening a new browser tab.
+  Shell::Get()->new_window_controller()->NewTabWithUrl(url);
   assistant_ui_controller_->HideUi(AssistantSource::kUnspecified);
 }
 

ash/assistant/util/deep_link_util.cc

+// Copyright 2018 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 "ash/assistant/util/deep_link_util.h"
+
+#include "url/gurl.h"
+
+namespace ash {
+namespace assistant {
+namespace util {
+
+namespace {
+
+constexpr char kAssistantSettingsSpec[] = "googleassistant://settings";
+
+}  // namespace
+
+bool IsDeepLinkUrl(const GURL& url) {
+  return url.spec() == kAssistantSettingsSpec;
+}
+
+}  // namespace util
+}  // namespace assistant
+}  // namespace ash

ash/assistant/util/deep_link_util.h

+// Copyright 2018 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.
+
+#ifndef ASH_ASSISTANT_UTIL_DEEP_LINK_UTIL_H_
+#define ASH_ASSISTANT_UTIL_DEEP_LINK_UTIL_H_
+
+class GURL;
+
+namespace ash {
+namespace assistant {
+namespace util {
+
+// Returns true if the specified |url| is a deep link, false otherwise.
+bool IsDeepLinkUrl(const GURL& url);
+
+}  // namespace util
+}  // namespace assistant
+}  // namespace ash
+
+#endif  // ASH_ASSISTANT_UTIL_DEEP_LINK_UTIL_H_