Convert plugin and GPU process to brokered handle duplication.

BUG=119250
Review URL: https://chromiumcodereview.appspot.com/9958034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@132303 0039d316-1c4b-4281-b951-d872f2087c98
bool WebGraphicsContext3DCommandBufferImpl::makeContextCurrent() {
  if (!MaybeInitializeGL(NULL))
    return false;
  gles2::SetGLContext(gl_);
  if (command_buffer_->GetLastError() != gpu::error::kNoError)
    return false;

  return true;
}

bool WebGraphicsContext3DCommandBufferImpl::makeContextCurrent() {
  if (!MaybeInitializeGL(NULL))
    return false;
  gles2::SetGLContext(gl_);
  if (command_buffer_->GetLastError() != gpu::error::kNoError)
    return false;

  return true;
}
