Fix autoplay during prerendering for media elements on Android.

chrome/browser/media/defer_background_media_browsertest.cc

 // 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.
 
+#include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
+#include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
 #include "media/base/test_data_util.h"
 
-// TODO(dalecurtis): Android does not correctly defer media today, fix and
-// enable this test (needs disable of user gesture).  http://crbug.com/522157
-#if !defined(OS_ANDROID)
-typedef InProcessBrowserTest MediaBrowserTest;
+class MediaBrowserTest : public InProcessBrowserTest {

[DaleCurtis, 2015/08/18 23:14:42]

I can't actually compile the chrome browser tests on Android, so I assume these
aren't running anywhere today -- but I've fixed it up such that it could run at
least.

[qinmin, 2015/08/19 21:31:14]

android dosn't run browser_tests, it runs chrome_test_apk or
chrome_public_test_apk

[DaleCurtis, 2015/08/20 17:59:22]

Hmm, chrome_test_apk is not a target and I can't find any variations of that
either. chrome_public_test_apk is a target, but I don't see any way of invoking
that. Do you have a wiki doc on this anywhere?

[DaleCurtis, 2015/08/20 18:00:24]

And right after I posted this, I found the right article:

https://code.google.com/p/chromium/wiki/AndroidTestInstructions

[DaleCurtis, 2015/08/20 18:47:10]

Doesn't look like those targets include any type of browser tests, so this fix
is kind of moot, but I'll leave it in case we ever start running them on
Android.

+ public:
+#if defined(OS_ANDROID)
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    command_line->AppendSwitch(
+        switches::kDisableGestureRequirementForMediaPlayback);
+  }
+#endif
+};
 
 IN_PROC_BROWSER_TEST_F(MediaBrowserTest, BackgroundMediaIsDeferred) {
   // Navigate to a video file, which would autoplay in the foreground, but won't
   // in the background due to deferred media loading for hidden tabs.
   ui_test_utils::NavigateToURLWithDisposition(
       browser(), content::GetFileUrlWithQuery(
                      media::GetTestDataFilePath("bear-640x360.webm"), ""),
       NEW_BACKGROUND_TAB, ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
 
   ASSERT_EQ(2, browser()->tab_strip_model()->count());
@@ skipping 22 matching lines @@
   EXPECT_EQ(background_contents,
             browser()->tab_strip_model()->GetActiveWebContents());
 
   // If everything worked, we should see "playing" and not "ended".
   const base::string16 playing_str = base::UTF8ToUTF16("playing");
   const base::string16 ended_str = base::UTF8ToUTF16("ended");
   content::TitleWatcher watcher(background_contents, playing_str);
   watcher.AlsoWaitForTitle(ended_str);
   EXPECT_EQ(playing_str, watcher.WaitAndGetTitle());
 }
-#endif  // !defined(OS_ANDROID)