Implement Windows GPO support for "dlpref" in component updater.

components/update_client/update_checker_unittest.cc

 // 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.
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 169 matching lines @@
   RunThreads();
 
   EXPECT_EQ(1, post_interceptor_->GetHitCount())
       << post_interceptor_->GetRequestsAsString();
   ASSERT_EQ(1, post_interceptor_->GetCount())
       << post_interceptor_->GetRequestsAsString();
 
   // Sanity check the request.
   EXPECT_NE(string::npos, post_interceptor_->GetRequests()[0].find(
                               "request protocol=\"3.0\" extra=\"params\""));
+  // The request must not contain any "dlpref" in the default case.
+  EXPECT_EQ(string::npos,
+            post_interceptor_->GetRequests()[0].find(" dlpref=\""));
   EXPECT_NE(
       string::npos,
       post_interceptor_->GetRequests()[0].find(
           "app appid=\"jebgalgnebhfojomionfpkfelancnnkf\" version=\"0.9\">"
           "<updatecheck /><packages><package fp=\"fp1\"/></packages></app>"));
 
   EXPECT_NE(string::npos,
             post_interceptor_->GetRequests()[0].find("<hw physmemory="));
 
   // Sanity check the arguments of the callback after parsing.
@@ skipping 29 matching lines @@
   EXPECT_EQ(1, post_interceptor_->GetCount())
       << post_interceptor_->GetRequestsAsString();
 
   ASSERT_FALSE(config_->UpdateUrl().empty());
   EXPECT_EQ(config_->UpdateUrl().front(), original_url_);
   EXPECT_EQ(403, error_);
   EXPECT_STREQ("network error", error_message_.c_str());
   EXPECT_EQ(0ul, results_.list.size());
 }
 
+TEST_F(UpdateCheckerTest, UpdateCheckDownloadPreference) {
+  EXPECT_TRUE(post_interceptor_->ExpectRequest(
+      new PartialMatch("updatecheck"), test_file("updatecheck_reply_1.xml")));
+
+  config_->SetDownloadPreference(string("cacheable"));
+
+  update_checker_ = UpdateChecker::Create(config_);
+
+  CrxUpdateItem item(BuildCrxUpdateItem());
+  std::vector<CrxUpdateItem*> items_to_check;
+  items_to_check.push_back(&item);
+
+  update_checker_->CheckForUpdates(
+      items_to_check, "extra=\"params\"",
+      base::Bind(&UpdateCheckerTest::UpdateCheckComplete,
+                 base::Unretained(this)));
+
+  RunThreads();
+
+  // The request must contain dlpref="cacheable".
+  EXPECT_NE(string::npos,
+            post_interceptor_->GetRequests()[0].find(" dlpref=\"cacheable\""));
+}
+
 }  // namespace update_client