move libevent into base

ui/gl/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/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
@@ skipping 141 matching lines @@
       "gl_surface_egl.cc",
       "gl_surface_egl.h",
     ]
   }
   if (is_android || is_linux) {
     sources += [
       "gl_implementation_osmesa.cc",
       "gl_implementation_osmesa.h",
     ]
   }
-  if (is_linux) {
-    deps += [ "//third_party/libevent" ]
-  }
   if (!is_android) {  # TODO(GYP) Enable on Android when osmesa links.
     deps += [ "//third_party/mesa:osmesa" ]
   }
   if (use_x11) {
     sources += [
       "gl_bindings_autogen_glx.cc",
       "gl_bindings_autogen_glx.h",
       "gl_context_glx.cc",
       "gl_context_glx.h",
       "gl_context_x11.cc",
@@ skipping 220 matching lines @@
     sources = [
       "../android/java/src/org/chromium/ui/gl/SurfaceTextureListener.java",
       "../android/java/src/org/chromium/ui/gl/SurfaceTexturePlatformWrapper.java",
     ]
     public_deps = [
       ":surface_jni_headers",
     ]
     jni_package = "ui/gl"
   }
 }