content: Remove unused speex related code.

content/browser/BUILD.gn

 # Copyright 2014 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/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//content/browser/browser.gni")
 import("//media/media_options.gni")
 
@@ skipping 453 matching lines @@
   }
 
   if (!is_ios) {
     sources += [
       "compositor/surface_utils.cc",
       "compositor/surface_utils.h",
     ]
   }
 
   if (enable_web_speech) {
-    deps += [
-      "//third_party/flac",
-      "//third_party/speex",
-    ]
+    deps += [ "//third_party/flac" ]
   }
 
   if (is_linux && use_dbus) {
     deps += [ "//dbus" ]
   }
 
   if (enable_browser_cdms) {
     sources += [
       "media/cdm/browser_cdm_manager.cc",
       "media/cdm/browser_cdm_manager.h",
@@ skipping 13 matching lines @@
   if (enable_webvr) {
     sources += [
       "vr/vr_device.cc",
       "vr/vr_device.h",
       "vr/vr_device_manager.cc",
       "vr/vr_device_manager.h",
       "vr/vr_device_provider.h",
     ]
   }
 }