Linux build: Use sysroot when calculating dependencies

chrome/installer/linux/BUILD.gn

 # Copyright 2015 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/features.gni")
 import("//build/config/sanitizers/sanitizers.gni")
+import("//build/config/sysroot.gni")
 import("//build/util/process_version.gni")
 import("//build/util/version.gni")
 import("//chrome/process_version_rc_template.gni")  # For branding_file_path.
 
 if (current_cpu == "x86" || current_cpu == "x64") {
   import("//media/cdm/ppapi/cdm_paths.gni")
 }
 
 assert(is_linux)
 
@@ skipping 82 matching lines @@
   ]
 }
 
 copy("deb_packaging_files") {
   visibility = [ ":*" ]
   sources = [
     "debian/build.sh",
     "debian/changelog.template",
     "debian/control.template",
     "debian/debian.menu",
-    "debian/expected_deps_ia32_precise",
-    "debian/expected_deps_ia32_trusty",
-    "debian/expected_deps_x64_precise",
-    "debian/expected_deps_x64_trusty",
+    "debian/expected_deps_ia32_jessie",
+    "debian/expected_deps_ia32_wheezy",
+    "debian/expected_deps_x64_jessie",
+    "debian/expected_deps_x64_wheezy",
     "debian/postinst",
     "debian/postrm",
     "debian/prerm",
   ]
   outputs = [
     "$root_out_dir/installer/debian/{{source_file_part}}",
   ]
 }
 
 copy("theme_files") {
@@ skipping 151 matching lines @@
       "-o",
       rebase_path(root_out_dir, root_build_dir),
       "-b",
       rebase_path(root_out_dir, root_build_dir),
       "-a",
       build_script_arch,
       "-c",
       invoker.channel,
       "-d",
       branding_path_component,
+      "-s",
+      rebase_path(sysroot),
+      "-e",
+      rebase_path("//third_party/dpkg-dev"),
     ]
     deps = [
       ":installer_deps",
     ]
   }
 
   if (!is_chromeos) {
     rpm_target_name = "${target_name}_rpm"
     action(rpm_target_name) {
       visibility = [ ":*" ]
@@ skipping 58 matching lines @@
 # Other packages that we support that aren't included in the default "linux"
 # target.
 linux_package("trunk") {
   channel = "trunk"
 }
 if (is_asan) {
   linux_package("asan") {
     channel = "asan"
   }
 }