ozone: Implement zero/one-copy texture for Ozone GBM.

content/content_common.gypi

Index: content/content_common.gypi
diff --git a/content/content_common.gypi b/content/content_common.gypi
index f989b373e088bb6e9a139e0b25663d8440ca9f9c..b35bec85bcab87c7722b9c90f1e2528ccb12827a 100644
--- a/content/content_common.gypi
+++ b/content/content_common.gypi
@@ -1056,5 +1056,15 @@
         'common/gpu/gpu_memory_buffer_factory_ozone_native_buffer.h',
       ],
     }],
+    ['ozone_platform_gbm==1', {
+      'defines': ['USE_OZONE_GBM'],
+      'dependencies': [
+        '../build/linux/system.gyp:libdrm',
+      ],
+      'sources': [
+        'common/gpu/client/gpu_memory_buffer_impl_ozone_gbm.cc',
+        'common/gpu/client/gpu_memory_buffer_impl_ozone_gbm.h',
+      ],
+    }],
   ],
 }