Add command buffer support for EXT_sRGB_write_control

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 53 matching lines @@
                              static_cast<double>(size.height()),
                              kFragmentShader)
               .c_str());
     default:
       NOTREACHED();
       return 0;
   }
 }
 
 bool GLTestHelper::HasExtension(const char* extension) {
-  std::string extensions(
-      reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS)));
-  return extensions.find(extension) != std::string::npos;
+  // Pad with an extra space to ensure that |extension| is not a substring of
+  // another extension.
+  std::string extensions =
+      std::string(reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS))) +
+      " ";
+  std::string extension_padded = std::string(extension) + " ";
+  return extensions.find(extension_padded) != std::string::npos;
 }
 
 bool GLTestHelper::CheckGLError(const char* msg, int line) {
    bool success = true;
    GLenum error = GL_NO_ERROR;
    while ((error = glGetError()) != GL_NO_ERROR) {
      success = false;
      EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), error)
          << "GL ERROR in " << msg << " at line " << line << " : " << error;
    }
@@ skipping 265 matching lines @@
   ASSERT_NE(vertex_buffer, 0u);
   glUniform1i(sampler_location, 0);
 
   glDrawArrays(GL_TRIANGLES, 0, 6);
 
   glDeleteShader(vertex_shader);
   glDeleteShader(fragment_shader);
   glDeleteProgram(program);
   glDeleteBuffers(1, &vertex_buffer);
 }