Revert of [Chromecast][Temporary] Disable TCMallocTest.Realloc on cast audio.

chromecast/BUILD.gn

 # 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.
 
 import("//build/buildflag_header.gni")
 import("//build/config/features.gni")
 import("//build/config/locales.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//chromecast/build/tests/cast_test.gni")
@@ skipping 131 matching lines @@
         "ProcessUtilTest.*",
         "StackContainer.BufferAlignment",
         "SystemMetrics2Test.GetSystemMemoryInfo",
         "TimeFormattingTest.TimeFormat*",
       ]
 
       if (is_cast_audio_only) {
         # Also disable TimeFormattingTest on audio-only builds, since we don't
         # include the necessary info in icudtl.dat.
         gtest_excludes += [ "TimeFormattingTest.*" ]
-
-        # TODO(mbjorge): Temporarily disable Realloc test on audio devices,
-        # since it mysteriously is failing. As part of an effort to re-green
-        # the unittests, current (2017-03-15) failures are being disabled to get
-        # back to a green state. Re-enable once the tests have been fixed.
-        # b/36238217, hotlist/461351
-        gtest_excludes += [ "TCMallocTest.Realloc" ]
       }
     }
   }
   filters += [ base_unittests_filter ]
 
   content_unittests_filter = {
     test_name = "content_unittests"
     gtest_excludes = []
     if (target_os == "linux" && !is_cast_desktop_build) {
       # DesktopCaptureDeviceTest.*: No capture device on Eureka
@@ skipping 303 matching lines @@
     shared_libraries = [ "//chromecast/android:libcast_shell_android" ]
 
     deps = [
       ":cast_shell_apk_assets",
       "//base:base_java",
       "//chromecast/android:libcast_shell_android",
       "//chromecast/browser/android:cast_shell_java",
     ]
   }
 }