Remove GL_CHROMIUM_iosurface extension

gpu/command_buffer/service/feature_info.cc

 // Copyright (c) 2012 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 "gpu/command_buffer/service/feature_info.h"
 
 #include <stddef.h>
 
 #include <set>
 #include <vector>
@@ skipping 943 matching lines @@
     validators_.texture_internal_format_storage.AddValue(
         GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG);
     validators_.texture_internal_format_storage.AddValue(
         GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG);
     validators_.texture_internal_format_storage.AddValue(
         GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG);
     validators_.texture_internal_format_storage.AddValue(
         GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG);
   }
 
-  // Ideally we would only expose this extension on Mac OS X, to
-  // support GL_CHROMIUM_iosurface and the compositor. We don't want
-  // applications to start using it; they should use ordinary non-
-  // power-of-two textures. However, for unit testing purposes we
-  // expose it on all supported platforms.
+  // Ideally we would only expose this extension on Mac OS X, to support
+  // IOSurface backed textures. We don't want applications to start using it;
+  // they should use ordinary non-power-of-two textures. However, for unit
+  // testing purposes we expose it on all supported platforms.
   if (extensions.Contains("GL_ARB_texture_rectangle") ||
       gl_version_info_->is_desktop_core_profile) {
     AddExtensionString("GL_ARB_texture_rectangle");
     feature_flags_.arb_texture_rectangle = true;
     // Rectangle textures are used as samplers via glBindTexture, framebuffer
     // textures via glFramebufferTexture2D, and copy destinations via
     // glCopyPixels.
     validators_.texture_bind_target.AddValue(GL_TEXTURE_RECTANGLE_ARB);
     validators_.texture_target.AddValue(GL_TEXTURE_RECTANGLE_ARB);
     validators_.get_tex_param_target.AddValue(GL_TEXTURE_RECTANGLE_ARB);
     validators_.g_l_state.AddValue(GL_TEXTURE_BINDING_RECTANGLE_ARB);
   }
 
 #if defined(OS_MACOSX)
   if (gl::GetGLImplementation() != gl::kGLImplementationOSMesaGL) {
-    AddExtensionString("GL_CHROMIUM_iosurface");
     AddExtensionString("GL_CHROMIUM_ycbcr_420v_image");
     feature_flags_.chromium_image_ycbcr_420v = true;
   }
 #endif
 
   if (extensions.Contains("GL_APPLE_ycbcr_422")) {
     AddExtensionString("GL_CHROMIUM_ycbcr_422_image");
     feature_flags_.chromium_image_ycbcr_422 = true;
   }
 
@@ skipping 400 matching lines @@
   if (pos == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 FeatureInfo::~FeatureInfo() {
 }
 
 }  // namespace gles2
 }  // namespace gpu