Blink Clipboard: Remove Stale NBSP TODOs.

This is a follow-up to the following CL: https://crrev.com/c/2252950.
Remove TODOs to remove calls stripping Non-Breaking Spaces.

Change-Id: I9f56378be2091dadb2e5b732d8573e4b8c254eda
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2295795Reviewed-by: enne <enne@chromium.org>
Reviewed-by: Darwin Huang <huangdarwin@chromium.org>
Commit-Queue: Darwin Huang <huangdarwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803655}

third_party/blink/renderer/core/editing/commands/clipboard_commands.cc

@@ -207,8 +207,6 @@ void ClipboardCommands::WriteSelectionToClipboard(LocalFrame& frame) {
   String plain_text = frame.SelectedTextForClipboard();
   frame.GetSystemClipboard()->WriteHTML(html, url,
                                         GetSmartReplaceOption(frame));
-  // TODO(dsleeps): consider consolidating ReplaceNBSPWithSpace into
-  // WritePlainText. WriteHTML always used ReplaceNBSOWithSpace before writing.
   ReplaceNBSPWithSpace(plain_text);
   frame.GetSystemClipboard()->WritePlainText(plain_text,
                                              GetSmartReplaceOption(frame));

third_party/blink/renderer/core/exported/web_plugin_container_impl.cc

@@ -402,8 +402,6 @@ void WebPluginContainerImpl::Copy() {
   LocalFrame* frame = element_->GetDocument().GetFrame();
   frame->GetSystemClipboard()->WriteHTML(web_plugin_->SelectionAsMarkup(),
                                          KURL());
-  // TODO(dsleeps): consider consolidating ReplaceNBSPWithSpace into
-  // WritePlainText. WriteHTML always used ReplaceNBSOWithSpace before writing.
   String text = web_plugin_->SelectionAsText();
   ReplaceNBSPWithSpace(text);
   frame->GetSystemClipboard()->WritePlainText(text);