Add gl tests to make sure when a buffer is unmapped, all access path generates an INVALID_OPERATION.

gpu/command_buffer/service/program_manager.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/program_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 675 matching lines @@
                << ", name = " << info.name;
     }
   }
 
   UpdateFragmentInputs();
   UpdateProgramOutputs();
   UpdateFragmentOutputBaseTypes();
   UpdateVertexInputBaseTypes();
   UpdateUniformBlockSizeInfo();
 
+  effective_transform_feedback_buffer_mode_ = transform_feedback_buffer_mode_;
+  effective_transform_feedback_varyings_ = transform_feedback_varyings_;

[Zhenyao Mo, 2016/10/07 21:05:36]

This behavior will also be tested in the webgl2 conformance test suite.

+
   valid_ = true;
 }
 
 void Program::UpdateUniforms() {
   // Reserve each client-bound uniform location. This way unbound uniforms will
   // not be allocated to locations that user expects bound uniforms to be, even
   // if the expected uniforms are optimized away by the driver.
   for (const auto& binding : bind_uniform_location_map_) {
     if (binding.second < 0)
       continue;
@@ skipping 1872 matching lines @@
   DCHECK(program);
   program->ClearUniforms(&zero_);
 }
 
 int32_t ProgramManager::MakeFakeLocation(int32_t index, int32_t element) {
   return index + element * 0x10000;
 }
 
 }  // namespace gles2
 }  // namespace gpu