Revert of [Chromoting] Disable building 64bit chromoting.msi file.

remoting/host/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/config/win/manifest.gni")
 import("//build/util/version.gni")
 import("//chrome/version.gni")
 import("//remoting/remoting_enable.gni")
@@ skipping 1126 matching lines @@
                "VERSION=$chrome_version_full",
                "OFFICIAL_BUILD=$_official_build",
              ]
     }
   } else {
     group("remoting_me2me_host_archive") {
     }
   }
 
   if (is_win && is_chrome_branded) {
-    # We do not release a 64 bits binary. So to avoid any potential
-    # misunderstanding, we only build 32 bits MSI file.
     if (target_cpu == "x86") {
       # The script uses "ia32" instead of "x86".
       msi_script_arch = "ia32"
+    } else {
+      msi_script_arch = target_cpu
+    }
 
-      # GYP version: remoting/remoting_host_win.gyp:remoting_host_installation
-      action("remoting_host_installation") {
-        deps = [
-          "//remoting/host:remoting_me2me_host_archive",
-        ]
-        script = "../tools/zip2msi.py"
-        outputs = [
-          "$root_out_dir/chromoting.msi",
-        ]
-        args = [
-          "--wix_path",
-          rebase_path("//third_party/wix"),
-          "--intermediate_dir",
-          rebase_path("$root_gen_dir/installation", root_build_dir),
-          "--target_arch",
-          msi_script_arch,
-          rebase_path("$root_out_dir/remoting-me2me-host-$current_os.zip",
-                      root_build_dir),
-          rebase_path(outputs[0], root_build_dir),
-        ]
-      }
-    } else {
-      group("remoting_host_installation") {
-      }
+    # GYP version: remoting/remoting_host_win.gyp:remoting_host_installation
+    action("remoting_host_installation") {
+      deps = [
+        "//remoting/host:remoting_me2me_host_archive",
+      ]
+      script = "../tools/zip2msi.py"
+      outputs = [
+        "$root_out_dir/chromoting.msi",
+      ]
+      args = [
+        "--wix_path",
+        rebase_path("//third_party/wix"),
+        "--intermediate_dir",
+        rebase_path("$root_gen_dir/installation", root_build_dir),
+        "--target_arch",
+        msi_script_arch,
+        rebase_path("$root_out_dir/remoting-me2me-host-$current_os.zip",
+                    root_build_dir),
+        rebase_path(outputs[0], root_build_dir),
+      ]
     }
   }
 }