Fix misleading comment in OmniboxViewViews::OnTabChanged.

The comment refers to code in Browser::ActiveTabChanged, not
BrowserView::OnTabChanged. See code block below

https://cs.chromium.org/chromium/src/chrome/browser/ui/browser.cc?type=cs&q=Browser+ActiveTabChanged&sq=package:chromium&l=1064-1067

This is particularly misleading as one might try to find
the reference in BrowserView::OnActiveTabChanged, which has no
direct reference to the comment in OmniboxViewViews::OnTabChanged.

Change-Id: I71e79e3fe6e874b569e9d4b6da122852eccd3d37
Reviewed-on: https://chromium-review.googlesource.com/767367
Commit-Queue: Gheorghe Comanici <gcomanici@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#516314}

chrome/browser/ui/views/omnibox/omnibox_view_views.cc

@@ -197,8 +197,8 @@ void OmniboxViewViews::OnTabChanged(const content::WebContents* web_contents) {
   if (state) {
     // This assumes that the omnibox has already been focused or blurred as
     // appropriate; otherwise, a subsequent OnFocus() or OnBlur() call could
-    // goof up the selection.  See comments at the end of
-    // BrowserView::ActiveTabChanged().
+    // goof up the selection.  See comments on OnActiveTabChanged() call in
+    // Browser::ActiveTabChanged().
     SelectRange(state->selection);
     saved_selection_for_focus_change_ = state->saved_selection_for_focus_change;
   }