Revert "Gyp support for Ozone."

build/common_defines.gypi

@@ -13,14 +13,6 @@
 
         'angle_build_winrt%': '0',
         'angle_build_winphone%': '0',
-
-        # This works like the Ozone GBM platform in Chrome:
-        # - Generic Buffer Manager (gbm) to allocate buffers
-        # - EGL_EXT_image_dma_buf_import to render into those buffers via EGLImage
-        # - Direct Rendering Manager + Kernel Mode Setting to scan out from those buffers
-        # - EGL_PLATFORM_SURFACELESS because there are no native windows
-        'use_ozone%': 0,
-
         'conditions':
         [
             ['OS=="linux" and use_x11==1 and chromeos==0', {
@@ -46,10 +38,6 @@
     ],
     'conditions':
     [
-        ['use_ozone==1',
-        {
-            'defines': [ 'USE_OZONE' ],
-        }],
         ['component=="shared_library"',
         {
             'defines': [ 'COMPONENT_BUILD' ],

build/standalone.gypi

@@ -19,7 +19,7 @@
         {
             'conditions':
             [
-                ['OS=="linux" and use_ozone==0',
+                ['OS=="linux"',
                 {
                     'use_x11': 1,
                 },

src/angle.gyp

@@ -38,10 +38,6 @@
             {
                 'angle_enable_gl%': 1,
             }],
-            ['use_ozone==1',
-            {
-                'angle_enable_gl%': 1,
-            }],
         ],
     },
     'includes':