Check for some extensions before calling potentially NULL GL entry points.

gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc b/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc
index 742793d0a190fa8aa0db443b4d0e99801b0abbba..01838e344cd84d1e8614c535d3511ce4c2460799 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc
@@ -4,6 +4,7 @@
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder_passthrough.h"
 
+#include "base/strings/string_split.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "ui/gl/gl_version_info.h"
@@ -173,7 +174,9 @@ bool GLES2DecoderPassthroughImpl::Initialize(
 
   // Check for required extensions
   if (!feature_info_->feature_flags().angle_robust_client_memory ||
-      !feature_info_->feature_flags().chromium_bind_generates_resource) {
+      !feature_info_->feature_flags().chromium_bind_generates_resource ||
+      !feature_info_->feature_flags().chromium_copy_texture ||
+      !feature_info_->feature_flags().chromium_copy_compressed_texture) {
     // TODO(geofflang): Verify that ANGLE_webgl_compatibility is enabled if this
     // is a WebGL context (depends on crbug.com/671217).
     Destroy(true);