Add calls to the server to request WebAPK updates.

chrome/browser/android/webapk/webapk_installer.h

Index: chrome/browser/android/webapk/webapk_installer.h
diff --git a/chrome/browser/android/webapk/webapk_installer.h b/chrome/browser/android/webapk/webapk_installer.h
index 396549876cf4e4c026f538952f930544f75fb3df..2c09a974061e38122c402f1aac925b37345b2d22 100644
--- a/chrome/browser/android/webapk/webapk_installer.h
+++ b/chrome/browser/android/webapk/webapk_installer.h
@@ -26,23 +26,34 @@ namespace content {
 class BrowserContext;
 }
 
+namespace google {
+namespace protobuf {
+class MessageLite;
+}
+}
+
 namespace net {
 class URLFetcher;
 class URLRequestContextGetter;
 }
 
 namespace webapk {
-class CreateWebApkRequest;
+class WebApk;
 }
 
 // Talks to Chrome WebAPK server and Google Play to generate a WebAPK on the
 // server, download it, and install it.
 class WebApkInstaller : public net::URLFetcherDelegate {
  public:
+  // Called when either a request of creating or updating WebAPK has been sent
+  // or the creation process of the WebAPK on the server side fails.
+  // Parameters:
+  // - whether the request succeeds.
   using FinishCallback = base::Callback<void(bool)>;
 
   WebApkInstaller(const ShortcutInfo& shortcut_info,
                   const SkBitmap& shorcut_icon);
+
   ~WebApkInstaller() override;
 
   // Register JNI methods.
@@ -59,6 +70,15 @@ class WebApkInstaller : public net::URLFetcherDelegate {
       net::URLRequestContextGetter* request_context_getter,
       const FinishCallback& callback);
 
+  // Talks to the Chrome WebAPK server to update a WebAPK on the server and to
+  // the Google Play server to download and install the generated WebAPK. Calls
+  // |callback| after the request to download and install the WebAPK is sent to
+  // the Google Play server.
+  void UpdateAsync(content::BrowserContext* browser_context,
+                   const FinishCallback& callback,
+                   const std::string& webapk_package,
+                   int version);
+
  protected:
   // Starts installation of the downloaded WebAPK. Returns whether the install
   // could be started. The installation may still fail if true is returned.
@@ -78,10 +98,18 @@ class WebApkInstaller : public net::URLFetcherDelegate {
   void InitializeRequestContextGetterOnUIThread(
       content::BrowserContext* browser_context);
 
-  // Sends request to WebAPK server to create WebAPK. During a successful
-  // request the WebAPK server responds with the URL of the generated WebAPK.
+  // Sends request to WebAPK server to create WebAPK.
   void SendCreateWebApkRequest();
 
+  // Sends request to WebAPK server to update a WebAPK.
+  void SendUpdateWebApkRequest();
+
+  // Sends a request to WebAPK server. During a successful request the
+  // WebAPK server responds with a URL to send to Google Play to
+  // download and install the generated WebAPK.
+  void SendRequest(
+      std::unique_ptr<::google::protobuf::MessageLite> request_proto);
+
   // Called with the URL of generated WebAPK and the package name that the
   // WebAPK should be installed at.
   void OnGotWebApkDownloadUrl(const std::string& download_url,
@@ -95,8 +123,8 @@ class WebApkInstaller : public net::URLFetcherDelegate {
                           const std::string& package_name,
                           FileDownloader::Result result);
 
-  // Populates webapk::CreateWebApkRequest and returns it.
-  std::unique_ptr<webapk::CreateWebApkRequest> BuildCreateWebApkRequest();
+  // Populate the |webapk| field of a request.
+  void PopulateWebApkProto(webapk::WebApk* webapk);
 
   // Called when the request to the WebAPK server times out or when the WebAPK
   // download times out.
@@ -135,6 +163,12 @@ class WebApkInstaller : public net::URLFetcherDelegate {
   // WebAPK server URL.
   GURL server_url_;
 
+  // WebAPK package name.
+  std::string webapk_package_;
+
+  // WebAPK version code.
+  int version_;
+
   // Used to get |weak_ptr_| on the IO thread.
   base::WeakPtrFactory<WebApkInstaller> io_weak_ptr_factory_;