Modify app title font

Changes:
Use Roboto-regular, 13px font size, 20px line height for the app title.

Demo: https://drive.google.com/open?id=10sYR2tFWezxuUYp-IpKoozHIZtMS4u-q

Bug: 869349
Change-Id: Ic5b14b3cf1df9aeaab722d04d59720c3184d731b
Reviewed-on: https://chromium-review.googlesource.com/1174898
Commit-Queue: Weidong Guo <weidongg@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584106}

ash/app_list/views/app_list_item_view.cc

@@ -157,9 +157,8 @@ AppListItemView::AppListItemView(AppsGridView* apps_grid_view,
   title_->SetBackgroundColor(SK_ColorTRANSPARENT);
   title_->SetAutoColorReadabilityEnabled(false);
   title_->SetHandlesTooltips(false);
-  const gfx::FontList& font = AppListConfig::instance().app_title_font();
-  title_->SetFontList(font);
-  title_->SetLineHeight(font.GetHeight());
+  title_->SetFontList(AppListConfig::instance().app_title_font());
+  title_->SetLineHeight(AppListConfig::instance().app_title_max_line_height());
   title_->SetHorizontalAlignment(gfx::ALIGN_CENTER);
   title_->SetEnabledColor(apps_grid_view_->is_in_folder()
                               ? kFolderGridTitleColor

ash/app_list/views/top_icon_animation_view.cc

@@ -35,9 +35,8 @@ TopIconAnimationView::TopIconAnimationView(const gfx::ImageSkia& icon,
   title_->SetBackgroundColor(SK_ColorTRANSPARENT);
   title_->SetAutoColorReadabilityEnabled(false);
   title_->SetHandlesTooltips(false);
-  const gfx::FontList& font = AppListConfig::instance().app_title_font();
-  title_->SetFontList(font);
-  title_->SetLineHeight(font.GetHeight());
+  title_->SetFontList(AppListConfig::instance().app_title_font());
+  title_->SetLineHeight(AppListConfig::instance().app_title_max_line_height());
   title_->SetHorizontalAlignment(gfx::ALIGN_CENTER);
   title_->SetEnabledColor(SK_ColorBLACK);
   title_->SetText(title);

ash/public/cpp/app_list/app_list_config.cc

@@ -66,9 +66,7 @@ AppListConfig::AppListConfig()
     grid_focus_corner_radius_ = 12;
     app_title_max_line_height_ = 20;
     app_title_font_ =
-        ui::ResourceBundle::GetSharedInstance()
-            .GetFontList(ui::ResourceBundle::LargeFont)
-            .DeriveWithHeightUpperBound(app_title_max_line_height_);
+        ui::ResourceBundle::GetSharedInstance().GetFontListWithDelta(1);
     peeking_app_list_height_ = 284;
     search_box_closed_top_padding_ = 0;
     search_box_peeking_top_padding_ = 84;