Initialize renderer color preferences to reasonable defaults.

BUG=158422
TEST=as in bug


Review URL: https://chromiumcodereview.appspot.com/11365096

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@166146 0039d316-1c4b-4281-b951-d872f2087c98
 void Shell::SizeTo(int width, int height) {
  content_width_ = width;
  content_height_ = height;
  if (web_contents_.get()) {
    gtk_widget_set_size_request(web_contents_->GetNativeView(), width, height);
  }
}

 void Shell::SizeTo(int width, int height) {
  content_width_ = width;
  content_height_ = height;
  if (web_contents_.get()) {
    gtk_widget_set_size_request(web_contents_->GetNativeView(), width, height);
  }
}
