[Android WebAPK] Make webapk_installer.cc return proto as base64 string

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 2c21121a35cd4ef41edc180b4adec9df6d6b2e91..807ff83ff1b265ee753777765f680a657fa1df6f 100644
--- a/chrome/browser/android/webapk/webapk_installer.h
+++ b/chrome/browser/android/webapk/webapk_installer.h
@@ -8,7 +8,6 @@
 #include <jni.h>
 #include <map>
 #include <memory>
-#include <vector>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/callback.h"
@@ -51,13 +50,12 @@ class WebApkInstaller : public net::URLFetcherDelegate {
   // Creates a self-owned WebApkInstaller instance and talks to the Chrome
   // WebAPK server to update a WebAPK on the server and locally requests the
   // APK to be installed. Calls |callback| once the install completed or failed.
-  static void UpdateAsync(
-      content::BrowserContext* context,
-      const std::string& webapk_package,
-      const GURL& start_url,
-      const base::string16& short_name,
-      std::unique_ptr<std::vector<uint8_t>> serialized_proto,
-      const FinishCallback& callback);
+  static void UpdateAsync(content::BrowserContext* context,
+                          const std::string& webapk_package,
+                          const GURL& start_url,
+                          const base::string16& short_name,
+                          std::unique_ptr<std::string> serialized_proto,
+                          const FinishCallback& callback);
 
   // Calls the private function |InstallAsync| for testing.
   // Should be used only for testing.
@@ -74,7 +72,7 @@ class WebApkInstaller : public net::URLFetcherDelegate {
       const std::string& webapk_package,
       const GURL& start_url,
       const base::string16& short_name,
-      std::unique_ptr<std::vector<uint8_t>> serialized_proto,
+      std::unique_ptr<std::string> serialized_proto,
       const FinishCallback& callback);
 
   // Sets the timeout for the server requests.
@@ -95,8 +93,7 @@ class WebApkInstaller : public net::URLFetcherDelegate {
       const std::string& version,
       const std::map<std::string, std::string>& icon_url_to_murmur2_hash,
       bool is_manifest_stale,
-      const base::Callback<void(std::unique_ptr<std::vector<uint8_t>>)>&
-          callback);
+      const base::Callback<void(std::unique_ptr<std::string>)>& callback);
 
   // Registers JNI hooks.
   static bool Register(JNIEnv* env);
@@ -137,7 +134,7 @@ class WebApkInstaller : public net::URLFetcherDelegate {
   void UpdateAsync(const std::string& webapk_package,
                    const GURL& start_url,
                    const base::string16& short_name,
-                   const std::unique_ptr<std::vector<uint8_t>> serialized_proto,
+                   const std::unique_ptr<std::string> serialized_proto,
                    const FinishCallback& callback);
 
   // net::URLFetcherDelegate:
@@ -156,7 +153,7 @@ class WebApkInstaller : public net::URLFetcherDelegate {
   // Sends a request to WebAPK server to create/update WebAPK. During a
   // successful request the WebAPK server responds with a token to send to
   // Google Play.
-  void SendRequest(std::unique_ptr<std::vector<uint8_t>> serialized_proto);
+  void SendRequest(std::unique_ptr<std::string> serialized_proto);
 
   net::URLRequestContextGetter* request_context_getter_;