[omnibox] Add an icon for tab switch suggestions

Add a new icon for tab switch suggestions, to visually distinguish them
from suggestions which navigate.

Bug: 780835
Change-Id: I6aac9379808da0d7217d9fe84350c48c25104ff6
Reviewed-on: https://chromium-review.googlesource.com/766447Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Commit-Queue: Kevin Bailey <krb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#516011}

components/omnibox/browser/BUILD.gn

@@ -30,6 +30,7 @@ aggregate_vector_icons("omnibox_vector_icons") {
     "keyword_search.icon",
     "star.1x.icon",
     "star.icon",
+    "tab.icon",
   ]
 }
 

components/omnibox/browser/autocomplete_match.cc

@@ -199,9 +199,11 @@ const gfx::VectorIcon& AutocompleteMatch::TypeToVectorIcon(Type type) {
     case Type::CLIPBOARD:
     case Type::PHYSICAL_WEB:
     case Type::PHYSICAL_WEB_OVERFLOW:
-    case Type::TAB_SEARCH:
       return omnibox::kHttpIcon;
 
+    case Type::TAB_SEARCH:
+      return omnibox::kTabIcon;
+
     case Type::SEARCH_WHAT_YOU_TYPED:
     case Type::SEARCH_HISTORY:
     case Type::SEARCH_SUGGEST:

components/omnibox/browser/vector_icons/tab.icon

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+CANVAS_DIMENSIONS, 32,
+MOVE_TO, 2, 22,
+LINE_TO, 6, 8,
+LINE_TO, 24, 8,
+LINE_TO, 28, 22,
+LINE_TO, 24, 22,
+LINE_TO, 22, 12,
+LINE_TO, 8, 12,
+LINE_TO, 6, 22,
+LINE_TO, 2, 22,
+CLOSE,
+END