Omit save_password_infobar.cc from the build when unused

chrome/browser/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//third_party/protobuf/proto_library.gni")
 
@@ skipping 355 matching lines @@
     ]
   }
   if (is_mac) {
     sources +=
         rebase_path(gypi_values.chrome_browser_mac_sources, ".", "//chrome")
     deps += [
       #"app_shim"  TODO(GYP) bug 512600
       #"browser_app_shim"  TODO(GYP) bug 512600
     ]
   }
+  if (is_mac || is_android) {
+    sources += rebase_path(
+            gypi_values.chrome_browser_password_manager_mac_android_sources,
+            ".",
+            "//chrome")
+  }
   if (enable_extensions) {
     public_deps += [ "//chrome/browser/extensions" ]
     deps += [
       "//chrome/browser/sync_file_system/drive_backend:sync_file_system_drive_proto",
       "//chrome/common/extensions/api",
       "//chrome/common/extensions/api:api_registration",
       "//components/drive:drive",
       "//components/proximity_auth/ble",
       "//components/proximity_auth/cryptauth",
       "//extensions/components/javascript_dialog_extensions_client",
@@ skipping 857 matching lines @@
         rebase_path(gypi_values.chrome_browser_rlz_sources, ".", "//chrome")
     deps = [
       "//components/google/core/browser",
       "//components/omnibox/browser",
       "//components/rlz",
       "//components/search_engines",
       "//rlz:rlz_lib",
     ]
   }
 }