Introduce some util code for drawing vector assets.

ui/views/controls/image_view.cc

Index: ui/views/controls/image_view.cc
diff --git a/ui/views/controls/image_view.cc b/ui/views/controls/image_view.cc
index 4025713b6ab6cdd6d3ee2faed051ea11fba74483..efa1da4933c55d664aa8ff2e8279e9662e88d26c 100644
--- a/ui/views/controls/image_view.cc
+++ b/ui/views/controls/image_view.cc
@@ -31,6 +31,7 @@ const char ImageView::kViewClassName[] = "ImageView";
 
 ImageView::ImageView()
     : image_size_set_(false),
+      vector_id_(gfx::VECTOR_ICON_NONE),
       horiz_alignment_(CENTER),
       vert_alignment_(CENTER),
       interactive_(true),
@@ -67,6 +68,11 @@ const gfx::ImageSkia& ImageView::GetImage() {
   return image_;
 }
 
+void ImageView::SetVectorIcon(gfx::VectorIconId id, SkColor color) {
+  vector_id_ = id;
+  vector_color_ = color;
+}
+
 void ImageView::SetImageSize(const gfx::Size& image_size) {
   image_size_set_ = true;
   image_size_ = image_size;
@@ -161,6 +167,7 @@ void ImageView::OnBlur() {
 void ImageView::OnPaint(gfx::Canvas* canvas) {
   View::OnPaint(canvas);
   OnPaintImage(canvas);
+  OnPaintVectorIcon(canvas);
   Painter::PaintFocusPainter(this, canvas, focus_painter_.get());
 }
 
@@ -240,4 +247,13 @@ void ImageView::OnPaintImage(gfx::Canvas* canvas) {
   last_painted_bitmap_pixels_ = GetBitmapPixels(image_, last_paint_scale_);
 }
 
+void ImageView::OnPaintVectorIcon(gfx::Canvas* canvas) {
+  if (vector_id_ == gfx::VECTOR_ICON_NONE)
+    return;
+
+  gfx::Vector2d origin = ComputeImageOrigin(image_size_) - gfx::Point();
+  canvas->Translate(origin);
+  gfx::PaintVectorIcon(canvas, vector_id_, image_size_.width(), vector_color_);

[sky, 2015/07/01 16:19:52]

Seems like you should DCHECK on image_size_.

[Evan Stade, 2015/07/01 21:52:59]

Done.

+}
+
 }  // namespace views