Track currently bound external and multisample textures.

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 35a84dc733f3a6be544fe31c5cbc00e89ce41f5f..7a1985b4dd73e6df03ca0bacabc41a253194e944 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc
@@ -210,10 +210,17 @@ bool GLES2DecoderPassthroughImpl::Initialize(
   active_texture_unit_ = 0;
   bound_textures_[GL_TEXTURE_2D].resize(num_texture_units, 0);
   bound_textures_[GL_TEXTURE_CUBE_MAP].resize(num_texture_units, 0);
-  if (feature_info_->IsWebGL2OrES3Context()) {
+  if (feature_info_->gl_version_info().IsAtLeastGLES(3, 0)) {

[Zhenyao Mo, 2017/05/26 22:48:10]

Are you saying we will only create ES3 ANGLE contexts if we ask for WebGL2 or
ES3 decoder?

[Geoff Lang, 2017/05/29 13:47:43]

Correct, this is how ANGLE determines if it should do WebGL 1 or WebGL 2
validation as well.

     bound_textures_[GL_TEXTURE_2D_ARRAY].resize(num_texture_units, 0);
     bound_textures_[GL_TEXTURE_3D].resize(num_texture_units, 0);
   }
+  if (feature_info_->gl_version_info().IsAtLeastGLES(3, 1)) {
+    bound_textures_[GL_TEXTURE_2D_MULTISAMPLE].resize(num_texture_units, 0);
+  }
+  if (feature_info_->feature_flags().oes_egl_image_external ||
+      feature_info_->feature_flags().nv_egl_stream_consumer_external) {
+    bound_textures_[GL_TEXTURE_EXTERNAL_OES].resize(num_texture_units, 0);
+  }
 
   if (group_->gpu_preferences().enable_gpu_driver_debug_logging &&
       feature_info_->feature_flags().khr_debug) {