[ToolbarButton] Fix a trivial bug in SetLabelSideSpacing()

This CL fixes a trivial bug in ToolbarButton, introduced by
crrev.com/696762.

Bug: 1002160
Change-Id: Ifaafe299203292bd80b7f9f25497604e59900c4f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1807473
Commit-Queue: Jan Krcal <jkrcal@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Auto-Submit: Jan Krcal <jkrcal@chromium.org>
Reviewed-by: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#696864}

chrome/browser/ui/views/toolbar/toolbar_button.cc

@@ -141,7 +141,7 @@ void ToolbarButton::UpdateHighlightBackgroundAndInsets() {
 void ToolbarButton::SetLabelSideSpacing(int spacing) {
   gfx::Insets label_insets;
   // Add the spacing only if text is non-empty.
-  if (GetText().empty()) {
+  if (!GetText().empty()) {
     // Add spacing to the opposing side.
     if (GetHorizontalAlignment() == gfx::ALIGN_RIGHT) {
       label_insets = gfx::Insets(0, spacing, 0, 0);