[Omnibox] Default answer icon

This CL adds a default (or fallback) icon for Answers in Suggest that
don't have a specific icon.

Bug: 838733
Change-Id: I723d64e29f8222e873345c6e04d90e1b26cb1631
Reviewed-on: https://chromium-review.googlesource.com/1108514Reviewed-by: Mark Pearson <mpearson@chromium.org>
Commit-Queue: Dave Schuyler <dschuyler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568999}

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

@@ -323,6 +323,7 @@ void OmniboxMatchCellView::OnMatchUpdate(const OmniboxResultView* result_view,
           vector_icon = &omnibox::kAnswerWhenIsIcon;
           break;
         default:
+          vector_icon = &omnibox::kAnswerDefaultIcon;
           break;
       }
       if (vector_icon) {

components/omnibox/browser/BUILD.gn

@@ -21,6 +21,7 @@ aggregate_vector_icons("omnibox_vector_icons") {
 
   icons = [
     "answer_currency.icon",
+    "answer_default.icon",
     "answer_dictionary.icon",
     "answer_finance.icon",
     "answer_sunrise.icon",

components/omnibox/browser/vector_icons/answer_default.icon

+// Copyright 2018 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, 24,
+MOVE_TO, 12.23f, 14.28f,
+V_LINE_TO, 9.82f,
+H_LINE_TO, 23.33f,
+CUBIC_TO, 23.49f, 10.57f, 23.63f, 11.28f, 23.63f, 12.28f,
+CUBIC_TO, 23.63f, 19.13f, 19.08f, 24, 12.24f, 24,
+CUBIC_TO, 5.69f, 24, 0.38f, 18.62f, 0.38f, 12,
+CUBIC_TO, 0.38f, 5.38f, 5.69f, 0, 12.23f, 0,
+R_CUBIC_TO, 3.2f, 0, 5.88f, 1.19f, 7.93f, 3.13f,
+R_LINE_TO, -3.37f, 3.31f,
+R_CUBIC_TO, -0.85f, -0.82f, -2.34f, -1.79f, -4.56f, -1.79f,
+R_CUBIC_TO, -3.92f, 0, -7.13f, 3.3f, -7.13f, 7.34f,
+R_CUBIC_TO, 0, 4.04f, 3.2f, 7.34f, 7.13f, 7.34f,
+R_CUBIC_TO, 4.54f, 0, 6.21f, -3.18f, 6.52f, -5.06f,
+CLOSE