Revert "Add support for EGL on linux"

gyp/gpu.gyp

Index: gyp/gpu.gyp
diff --git a/gyp/gpu.gyp b/gyp/gpu.gyp
index 8cf9f76c48c5083ad7a2a77fac4053cb9390fc76..7bb61f09b6f5509f2934ac1b8632d23c5ee1b9b4 100644
--- a/gyp/gpu.gyp
+++ b/gyp/gpu.gyp
@@ -12,7 +12,6 @@
       }],
       ['skia_os != "linux" and skia_os != "chromeos"', {
         'sources/': [ ['exclude', '_unix.(h|cpp)$'],
-                      ['exclude', 'GrGLCreateNativeInterface_egl.cpp'],
         ],
       }],
       ['skia_os != "ios"', {
@@ -27,14 +26,6 @@
         'sources/': [ ['exclude', '_nacl.(h|cpp)$'],
         ],
       }],
-      ['skia_os == "nacl" or skia_egl == 0', {
-        'sources/': [ ['exclude', '_egl.(h|cpp)$'],
-        ],
-      }],
-      ['skia_egl == 1', {
-        'sources/': [ ['exclude', '_unix.(h|cpp)$'],
-        ],
-      }],
       # nullify the targets in this gyp file if skia_gpu is 0
       [ 'skia_gpu == 0', {
         'sources/': [
@@ -149,16 +140,6 @@
             '../src/gpu/gl/GrGLDefaultInterface_none.cpp',
             '../src/gpu/gl/GrGLCreateNativeInterface_none.cpp',
           ],
-        }],
-        [ '(skia_os == "linux" or skia_os == "chromeos") and skia_egl == 1', {
-          'link_settings': {
-            'libraries': [
-              '-lEGL',
-              '-lGLESv2',
-            ],
-          },
-        }],
-        [ '(skia_os == "linux" or skia_os == "chromeos") and skia_egl == 0', {
           'link_settings': {
             'libraries': [
               '-lGL',
@@ -174,11 +155,6 @@
             ],
           },
         }],
-        [ 'skia_egl==1', {
-          'defines': [
-            'SK_EGL',
-          ],
-        }],
         [ 'skia_mesa and skia_os == "linux"', {
           'link_settings': {
             'libraries': [