Make keyword hint view ("press tab to search foo.com") clickable.

chrome/browser/ui/views/location_bar/location_bar_view.cc

Index: chrome/browser/ui/views/location_bar/location_bar_view.cc
diff --git a/chrome/browser/ui/views/location_bar/location_bar_view.cc b/chrome/browser/ui/views/location_bar/location_bar_view.cc
index bb7929e84c17c95c4d30ce892b8e413b889574d9..5536a492e6f6f98592530eaa5fab5081a90c4c40 100644
--- a/chrome/browser/ui/views/location_bar/location_bar_view.cc
+++ b/chrome/browser/ui/views/location_bar/location_bar_view.cc
@@ -213,7 +213,7 @@ void LocationBarView::Init() {
   gfx::FontList bubble_font_list =
       font_list.DeriveWithHeightUpperBound(bubble_height);
   keyword_hint_view_ = new KeywordHintView(
-      profile(), font_list, bubble_font_list, location_height,
+      this, profile(), font_list, bubble_font_list, location_height,
       GetColor(LocationBarView::DEEMPHASIZED_TEXT), background_color);
   AddChildView(keyword_hint_view_);
 
@@ -709,6 +709,15 @@ void LocationBarView::OnDefaultZoomLevelChanged() {
   RefreshZoomView();
 }
 
+void LocationBarView::ButtonPressed(views::Button* sender,
+                                    const ui::Event& event) {
+  DCHECK_EQ(keyword_hint_view_, sender);
+  DCHECK(event.IsMouseEvent() || event.IsGestureEvent());
+  omnibox_view_->model()->AcceptKeyword(

[Peter Kasting, 2017/04/05 23:09:43]

We should probably only do this on IsOnlyLeftMouseButton or something?  Or do
other presses already not send ButtonPressed()?

[Evan Stade, 2017/04/06 00:05:41]

correct, NotifyClick/ButtonPressed is already only called for left mouse buttons
and gesture events

+      event.IsMouseEvent() ? KeywordModeEntryMethod::CLICK_ON_VIEW
+                           : KeywordModeEntryMethod::TAP_ON_VIEW);
+}
+
 bool LocationBarView::RefreshSaveCreditCardIconView() {
   WebContents* web_contents = GetWebContents();
   if (!web_contents)