Work around broken GL_TEXTURE_BINDING_EXTERNAL_OES query

gpu/command_buffer/service/gles2_cmd_decoder.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/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 1356 matching lines @@
   bool IsDrawValid(
       const char* function_name, GLuint max_vertex_accessed, GLsizei primcount);
 
   // Returns true if successful, simulated will be true if attrib0 was
   // simulated.
   bool SimulateAttrib0(
       const char* function_name, GLuint max_vertex_accessed, bool* simulated);
   void RestoreStateForAttrib(GLuint attrib);
 
   // If texture is a stream texture, this will update the stream to the newest
-  // buffer.
-  void UpdateStreamTextureIfNeeded(Texture* texture);
+  // buffer and bind the texture implicitly.
+  void UpdateStreamTextureIfNeeded(Texture* texture, GLuint texture_unit_index);
 
   // Returns false if unrenderable textures were replaced.
   bool PrepareTexturesForRender();
   void RestoreStateForNonRenderableTextures();
 
   // Returns true if GL_FIXED attribs were simulated.
   bool SimulateFixedAttribs(
       const char* function_name,
       GLuint max_vertex_accessed, bool* simulated, GLsizei primcount);
   void RestoreStateForSimulatedFixedAttribs();
@@ skipping 4345 matching lines @@
     const char* filename, int line, const std::string& msg) {
   logger_.LogMessage(filename, line, std::string("RENDER WARNING: ") + msg);
 }
 
 void GLES2DecoderImpl::PerformanceWarning(
     const char* filename, int line, const std::string& msg) {
   logger_.LogMessage(filename, line,
                      std::string("PERFORMANCE WARNING: ") + msg);
 }
 
-void GLES2DecoderImpl::UpdateStreamTextureIfNeeded(Texture* texture) {
+void GLES2DecoderImpl::UpdateStreamTextureIfNeeded(Texture* texture,
+                                                   GLuint texture_unit_index) {
   if (texture && texture->IsStreamTexture()) {
     DCHECK(stream_texture_manager());
     StreamTexture* stream_tex =
         stream_texture_manager()->LookupStreamTexture(texture->service_id());
-    if (stream_tex)
+    if (stream_tex) {
+      glActiveTexture(GL_TEXTURE0 + texture_unit_index);
       stream_tex->Update();
+    }
   }
 }
 
 bool GLES2DecoderImpl::PrepareTexturesForRender() {
   DCHECK(state_.current_program.get());
   bool have_unrenderable_textures =
       texture_manager()->HaveUnrenderableTextures();
   if (!have_unrenderable_textures && !features().oes_egl_image_external) {
     return true;
   }
 
   bool textures_set = false;
   const Program::SamplerIndices& sampler_indices =
      state_.current_program->sampler_indices();
   for (size_t ii = 0; ii < sampler_indices.size(); ++ii) {
     const Program::UniformInfo* uniform_info =
         state_.current_program->GetUniformInfo(sampler_indices[ii]);
     DCHECK(uniform_info);
     for (size_t jj = 0; jj < uniform_info->texture_units.size(); ++jj) {
       GLuint texture_unit_index = uniform_info->texture_units[jj];
       if (texture_unit_index < state_.texture_units.size()) {
         TextureUnit& texture_unit = state_.texture_units[texture_unit_index];
         TextureRef* texture =
             texture_unit.GetInfoForSamplerType(uniform_info->type).get();
         if (texture)
-          UpdateStreamTextureIfNeeded(texture->texture());
+          UpdateStreamTextureIfNeeded(texture->texture(), texture_unit_index);
         if (have_unrenderable_textures &&
             (!texture || !texture_manager()->CanRender(texture))) {
           textures_set = true;
           glActiveTexture(GL_TEXTURE0 + texture_unit_index);
           glBindTexture(
               GetBindTargetForSamplerType(uniform_info->type),
               texture_manager()->black_texture_id(uniform_info->type));
           LOCAL_RENDER_WARNING(
               std::string("texture bound to texture unit ") +
               base::IntToString(texture_unit_index) +
@@ skipping 4539 matching lines @@
   return error::kNoError;
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu