Add support for GL_TEXTURE_EXTERNAL_OES NV12 textures in cc/

cc/output/shader.cc

 // Copyright 2011 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.
 
 #include "cc/output/shader.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 115 matching lines @@
     case SAMPLER_TYPE_2D_RECT:
       DCHECK_NE(shader_string.find("SamplerType"), std::string::npos);
       DCHECK_NE(shader_string.find("TextureLookup"), std::string::npos);
       return "#extension GL_ARB_texture_rectangle : require\n"
              "#define SamplerType sampler2DRect\n"
              "#define TextureLookup texture2DRect\n" +
              shader_string;
     case SAMPLER_TYPE_EXTERNAL_OES:
       DCHECK_NE(shader_string.find("SamplerType"), std::string::npos);
       DCHECK_NE(shader_string.find("TextureLookup"), std::string::npos);
-      return "#extension GL_OES_EGL_image_external : require\n"
+      return "#extension GL_OES_EGL_image_external : enable\n"
+             "#extension GL_NV_EGL_stream_consumer_external : enable\n"
              "#define SamplerType samplerExternalOES\n"
              "#define TextureLookup texture2D\n" +
              shader_string;
     case SAMPLER_TYPE_NA:
       DCHECK_EQ(shader_string.find("SamplerType"), std::string::npos);
       DCHECK_EQ(shader_string.find("TextureLookup"), std::string::npos);
       return shader_string;
     default:
       NOTREACHED();
       break;
@@ skipping 2165 matching lines @@
     void main() {
       vec4 d4 = min(edge_dist[0], edge_dist[1]);
       vec2 d2 = min(d4.xz, d4.yw);
       float aa = clamp(gl_FragCoord.w * min(d2.x, d2.y), 0.0, 1.0);
       gl_FragColor = color * aa;
     }
   });
 }
 
 }  // namespace cc