Revert r95841 due to failing media_unittests on linux_shared bot.

media/filters/adaptive_demuxer_unittest.cc

 // Copyright (c) 2011 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/string_number_conversions.h"
 #include "media/filters/adaptive_demuxer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
+bool ParseAdaptiveUrl(
+    const std::string& url, int* audio_index, int* video_index,
+    std::vector<std::string>* urls);
+
 TEST(ParseAdaptiveUrlTest, BackwardsCompatible) {
   std::string manifest = "http://youtube.com/video.webm";
   int audio_index;
   int video_index;
   std::vector<std::string> urls;
   ASSERT_TRUE(ParseAdaptiveUrl(manifest, &audio_index, &video_index, &urls));
   EXPECT_EQ(audio_index, 0);
   EXPECT_EQ(video_index, 0);
   ASSERT_EQ(urls.size(), 1u);
   EXPECT_EQ(urls[0], manifest);
@@ skipping 40 matching lines @@
   EXPECT_FALSE(ParseAdaptiveUrl(
       "x-adaptive:0:file.webm", &audio_index, &video_index, &urls));
   EXPECT_FALSE(ParseAdaptiveUrl(
       "x-adaptive::0:file.webm", &audio_index, &video_index, &urls));
   // Invalid index for URL list.
   EXPECT_FALSE(ParseAdaptiveUrl(
       "x-adaptive:1:0:file.webm", &audio_index, &video_index, &urls));
 }
 
 }  // namespace media