Fix onKeyAdded check causing flakiness in the tests.

content/browser/encrypted_media_browsertest.cc

 // Copyright (c) 2012 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/basictypes.h"
 #include "base/command_line.h"
 #include "base/path_service.h"
 #include "base/string16.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
@@ skipping 111 matching lines @@
 #endif
 
 IN_PROC_BROWSER_TEST_F(EncryptedMediaTest, InvalidKeySystem) {
   const string16 kExpected = ASCIIToUTF16(
       StringToUpperASCII(std::string("GenerateKeyRequestException")));
   ASSERT_NO_FATAL_FAILURE(
       TestSimplePlayback("bear-320x240-av-enc_av.webm", kWebMAudioVideo,
                          "com.example.invalid", kExpected));
 }
 
-IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, DISABLED_BasicPlayback_AudioOnly) {
+IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, BasicPlayback_AudioOnly) {
   const string16 kExpected = ASCIIToUTF16("ENDED");
   ASSERT_NO_FATAL_FAILURE(
       TestSimplePlayback("bear-a-enc_a.webm", kWebMAudioOnly,
                          GetParam(), kExpected));
 }
 
 IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, BasicPlayback_AudioClearVideo) {
   const string16 kExpected = ASCIIToUTF16("ENDED");
   ASSERT_NO_FATAL_FAILURE(
       TestSimplePlayback("bear-320x240-av-enc_a.webm", kWebMAudioVideo,
@@ skipping 20 matching lines @@
       TestSimplePlayback("bear-320x240-av-enc_v.webm", kWebMAudioVideo,
                          GetParam(), kExpected));
 }
 
 IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, FrameChangeVideo) {
   const string16 kExpected = ASCIIToUTF16("ENDED");
   ASSERT_NO_FATAL_FAILURE(TestFrameSizeChange(GetParam(), kExpected));
 }
 
 }  // namespace content