[PresentationAPI] Implementing CloseSession from WebPresentationClient to PresentationService.

Depends on the Blink change: https://codereview.chromium.org/1015903002

BUG=459007

Review URL: https://codereview.chromium.org/999003004

Cr-Commit-Position: refs/heads/master@{#321278}

content/browser/presentation/presentation_service_impl.cc

@@ -256,6 +256,12 @@ void PresentationServiceImpl::SetDefaultPresentationURL(
   DoSetDefaultPresentationUrl(new_default_url, default_presentation_id);
 }
 
+void PresentationServiceImpl::CloseSession(
+    const mojo::String& presentation_url,
+    const mojo::String& presentation_id) {
+  NOTIMPLEMENTED();
+}
+
 void PresentationServiceImpl::DidNavigateAnyFrame(
     content::RenderFrameHost* render_frame_host,
     const content::LoadCommittedDetails& details,

content/browser/presentation/presentation_service_impl.h

@@ -161,6 +161,9 @@ class CONTENT_EXPORT PresentationServiceImpl
       const mojo::String& presentation_url,
       const mojo::String& presentation_id,
       const NewSessionMojoCallback& callback) override;
+  void CloseSession(
+      const mojo::String& presentation_url,
+      const mojo::String& presentation_id) override;
 
   // mojo::InterfaceImpl override.
   // Note that this is called when the RenderFrameHost is deleted.

content/common/presentation/presentation_service.mojom

@@ -69,4 +69,7 @@ interface PresentationService {
     // silently and without user action.
     JoinSession(string presentation_url, string? presentation_id)
         => (PresentationSessionInfo? sessionInfo, PresentationError? error);
+
+    // Called when closeSession() is called by the frame.
+    CloseSession(string presentation_url, string presentation_id);
 };

content/renderer/presentation/presentation_dispatcher.cc

@@ -120,6 +120,16 @@ void PresentationDispatcher::joinSession(
           base::Owned(callback)));
 }
 
+void PresentationDispatcher::closeSession(
+    const blink::WebString& presentationUrl,
+    const blink::WebString& presentationId) {
+  ConnectToPresentationServiceIfNeeded();
+
+  presentation_service_->CloseSession(
+      presentationUrl.utf8(),
+      presentationId.utf8());
+}
+
 void PresentationDispatcher::DidChangeDefaultPresentation() {
   GURL presentation_url(GetPresentationURLFromFrame(render_frame()));
 

content/renderer/presentation/presentation_dispatcher.h

@@ -41,6 +41,9 @@ class CONTENT_EXPORT PresentationDispatcher
       const blink::WebString& presentationUrl,
       const blink::WebString& presentationId,
       blink::WebPresentationSessionClientCallbacks* callback);
+  virtual void closeSession(
+      const blink::WebString& presentationUrl,
+      const blink::WebString& presentationId);
 
   // RenderFrameObserver
   void DidChangeDefaultPresentation() override;