[Reland] Add gl tests to make sure when a buffer is unmapped, all access path generates an INVALID_…

gpu/command_buffer/tests/gl_test_utils.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/tests/gl_test_utils.h"
 
 #include <GLES2/gl2extchromium.h>
 #include <stdint.h>
 #include <stdio.h>
 
@@ skipping 143 matching lines @@
   if (!vertex_shader || !fragment_shader) {
     return 0;
   }
   return SetupProgram(vertex_shader, fragment_shader);
 }
 
 GLuint GLTestHelper::SetupUnitQuad(GLint position_location) {
   GLuint vbo = 0;
   glGenBuffers(1, &vbo);
   glBindBuffer(GL_ARRAY_BUFFER, vbo);
-  static float vertices[] = {
-      1.0f,  1.0f,
-     -1.0f,  1.0f,
-     -1.0f, -1.0f,
-      1.0f,  1.0f,
-     -1.0f, -1.0f,
-      1.0f, -1.0f,
+  static const float vertices[] = {
+      1.0f, 1.0f, -1.0f, 1.0f,  -1.0f, -1.0f,
+      1.0f, 1.0f, -1.0f, -1.0f, 1.0f,  -1.0f,
   };
   glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
   glEnableVertexAttribArray(position_location);
   glVertexAttribPointer(position_location, 2, GL_FLOAT, GL_FALSE, 0, 0);
 
   return vbo;
 }
 
+std::vector<GLuint> GLTestHelper::SetupIndexedUnitQuad(
+    GLint position_location) {
+  GLuint array_buffer = SetupUnitQuad(position_location);
+  static const uint8_t indices[] = {0, 1, 2, 3, 4, 5};
+  GLuint index_buffer = 0;
+  glGenBuffers(1, &index_buffer);
+  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, index_buffer);
+  glBufferData(GL_ELEMENT_ARRAY_BUFFER, 6, indices, GL_STATIC_DRAW);
+  std::vector<GLuint> buffers(2);
+  buffers[0] = array_buffer;
+  buffers[1] = index_buffer;
+  return buffers;
+}
+
 GLuint GLTestHelper::SetupColorsForUnitQuad(
     GLint location, const GLfloat color[4], GLenum usage) {
   GLuint vbo = 0;
   glGenBuffers(1, &vbo);
   glBindBuffer(GL_ARRAY_BUFFER, vbo);
   GLfloat vertices[6 * 4];
   for (int ii = 0; ii < 6; ++ii) {
     for (int jj = 0; jj < 4; ++jj) {
       vertices[ii * 4 + jj] = color[jj];
     }
@@ skipping 147 matching lines @@
   ASSERT_NE(sampler_location, -1);
 
   GLuint vertex_buffer = GLTestHelper::SetupUnitQuad(sampler_location);
   glDrawArrays(GL_TRIANGLES, 0, 6);
 
   glDeleteShader(vertex_shader);
   glDeleteShader(fragment_shader);
   glDeleteProgram(program);
   glDeleteBuffers(1, &vertex_buffer);
 }