Add Open URL to Assistant mojo interface.

Bug: 807015
Change-Id: I2fb742bfd6d4745362edec1d43afbfb928787a9e
Reviewed-on: https://chromium-review.googlesource.com/954362
Commit-Queue: Li Lin <llin@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543868}

chromeos/services/assistant/assistant_manager_service_impl.cc

@@ -72,7 +72,7 @@ void AssistantManagerServiceImpl::OnShowText(const std::string& text) {
 }
 
 void AssistantManagerServiceImpl::OnOpenUrl(const std::string& url) {
-  subscribers_.ForAllPtrs([&url](auto* ptr) { ptr->OnTextResponse(url); });
+  subscribers_.ForAllPtrs([&url](auto* ptr) { ptr->OnOpenUrlResponse(url); });
 }
 
 }  // namespace assistant

chromeos/services/assistant/public/mojom/BUILD.gn

@@ -13,5 +13,6 @@ mojom("mojom") {
   public_deps = [
     "//mojo/common:common_custom_types",
     "//services/identity/public/mojom",
+    "//url/mojom:url_mojom_gurl",
   ]
 }

chromeos/services/assistant/public/mojom/assistant.mojom

@@ -4,6 +4,8 @@
 
 module chromeos.assistant.mojom;
 
+import "url/mojom/url.mojom";
+
 // Interface to communicate with assistant backend.
 interface Assistant {
   // Send text query to assistant. Result will be returned through registered
@@ -22,4 +24,7 @@ interface AssistantEventSubscriber {
 
   // Assistant's got text response from server.
   OnTextResponse(string response);
+
+  // Assistant's got open URL response from server.
+  OnOpenUrlResponse(url.mojom.Url url);
 };