Disable material design downloads UI from some tests.

chrome/test/base/web_ui_browser_test_browsertest.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 <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+#include "base/command_line.h"
 #include "base/values.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "chrome/test/base/web_ui_browser_test.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_message_handler.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest-spi.h"
 
 using content::WebUIMessageHandler;
 
 // According to the interface for EXPECT_FATAL_FAILURE
 // (http://code.google.com/p/googletest/wiki/AdvancedGuide#Catching_Failures)
 // the statement must be statically available. Therefore, we make a static
 // global s_test_ which should point to |this| for the duration of the test run
 // and be cleared afterward.
 class WebUIBrowserExpectFailTest : public WebUIBrowserTest {
  public:
   WebUIBrowserExpectFailTest() {
     EXPECT_FALSE(s_test_);
     s_test_ = this;
   }
 
+  // Disable new downloads UI as it is very very slow.

[Lei Zhang, 2015/09/01 22:41:07]

// Disable new downloads UI as it is very very slow. https://crbug.com/526577

Copy + paste elsewhere.

[benwells, 2015/09/01 23:06:11]

Done.

+  // TODO(dbeam): remove this once the downloads UI is not slow.
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    WebUIBrowserTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitch(switches::kDisableMaterialDesignDownloads);
+  }
+
  protected:
   ~WebUIBrowserExpectFailTest() override {
     EXPECT_TRUE(s_test_);
     s_test_ = NULL;
   }
 
   static void RunJavascriptTestNoReturn(const std::string& testname) {
     EXPECT_TRUE(s_test_);
     s_test_->RunJavascriptTest(testname);
   }
@@ skipping 194 matching lines @@
 // testDone directly and expect pass result.
 IN_PROC_BROWSER_TEST_F(WebUIBrowserAsyncTest, TestTestDoneEarlyPassesAsync) {
   ASSERT_TRUE(RunJavascriptAsyncTest("testDone"));
 }
 
 // Test that calling testDone during RunJavascriptTest still completes when
 // waiting for async result.
 IN_PROC_BROWSER_TEST_F(WebUIBrowserAsyncTest, TestTestDoneEarlyPasses) {
   ASSERT_TRUE(RunJavascriptTest("testDone"));
 }