Mark some flaky tests as disabled on Linux.

chrome/browser/media/encrypted_media_browsertest.cc

 // Copyright 2013 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/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/windows_version.h"
 #include "chrome/browser/media/media_browsertest.h"
@@ skipping 539 matching lines @@
 IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, Playback_VideoClearAudio_WebM) {
   TestSimplePlayback("bear-320x240-av_enc-v.webm", kWebMAudioVideo);
 }
 
 // Fails on linux debug: http://crbug.com/444827.
 #if defined(OS_LINUX)
 #define MAYBE_Playback_VP9Video_WebM DISABLED_Playback_VP9Video_WebM
 #else
 #define MAYBE_Playback_VP9Video_WebM Playback_VP9Video_WebM
 #endif
-IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, Playback_VP9Video_WebM) {
+IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, MAYBE_Playback_VP9Video_WebM) {
   TestSimplePlayback("bear-320x240-v-vp9_enc-v.webm", kWebMVP9VideoOnly);
 }
 
 // Fails on linux debug: http://crbug.com/444827.
 #if defined(OS_LINUX)
 #define MAYBE_Playback_AudioOnly_WebM_Opus DISABLED_Playback_AudioOnly_WebM_Opus
 #else
 #define MAYBE_Playback_AudioOnly_WebM_Opus Playback_AudioOnly_WebM_Opus
 #endif
-IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, Playback_AudioOnly_WebM_Opus) {
+IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, MAYBE_Playback_AudioOnly_WebM_Opus) {
   TestSimplePlayback("bear-320x240-opus-a_enc-a.webm", kWebMAudioOnly);
 }
 
 IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, Playback_VideoAudio_WebM_Opus) {
   TestSimplePlayback("bear-320x240-opus-av_enc-av.webm", kWebMAudioVideo);
 }
 
 IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, Playback_VideoClearAudio_WebM_Opus) {
   TestSimplePlayback("bear-320x240-opus-av_enc-v.webm", kWebMAudioVideo);
 }
@@ skipping 152 matching lines @@
                         "bear-320x240-v_enc-v.webm",
                         kWebMVideoOnly,
                         kExternalClearKeyKeySystem,
                         SRC,
                         UNPREFIXED,
                         kUnknownSession,
                         false,
                         kEmeKeyError);
 }
 #endif  // defined(ENABLE_PEPPER_CDMS)