chromeos: Fix pixelated icons in app list and launcher (part 1)

ui/gfx/image/image_skia.cc

Index: ui/gfx/image/image_skia.cc
diff --git a/ui/gfx/image/image_skia.cc b/ui/gfx/image/image_skia.cc
index e5fb8e3c617ce18b81fb4c00aea2918c07cd49d2..0dd7bffcb03ed628d97c322d69331fb9fd97512e 100644
--- a/ui/gfx/image/image_skia.cc
+++ b/ui/gfx/image/image_skia.cc
@@ -8,7 +8,9 @@
 #include <cmath>
 
 #include "base/logging.h"
+#include "skia/ext/image_operations.h"
 #include "ui/gfx/size.h"
+#include "ui/gfx/skbitmap_operations.h"
 #include "ui/gfx/skia_util.h"
 
 namespace gfx {
@@ -168,6 +170,55 @@ bool ImageSkia::extractSubset(ImageSkia* dst, const SkIRect& subset) const {
   return true;
 }
 
+ImageSkia ImageSkia::Resize(const gfx::Size& size) const {
+  DCHECK(!empty());
+
+  if (width() == size.width() && height() == size.height())
+    return *this;
+
+  ImageSkia image;
+  ImageSkiaReps& image_reps = storage_->image_reps();
+  for (ImageSkiaReps::iterator it = image_reps.begin();
+       it != image_reps.end(); ++it) {
+    const ImageSkiaRep& image_rep = *it;
+    float dip_scale = image_rep.GetScale();
+
+    gfx::Size scaled_size(static_cast<int>(size.width() * dip_scale),
+                          static_cast<int>(size.height() * dip_scale));
+    SkBitmap resized = skia::ImageOperations::Resize(image_rep.sk_bitmap(),
+         skia::ImageOperations::RESIZE_BEST,
+         scaled_size.width(),
+         scaled_size.height());
+    image.AddRepresentation(ImageSkiaRep(resized, image_rep.scale_factor()));
+  }
+
+  return image;
+}
+
+ImageSkia ImageSkia::CreateDropShadow(const gfx::ShadowValues& shadows) const {
+  DCHECK(!empty());
+
+  ImageSkia image;
+  ImageSkiaReps& image_reps = storage_->image_reps();
+  for (ImageSkiaReps::iterator it = image_reps.begin();
+       it != image_reps.end(); ++it) {
+    const ImageSkiaRep& image_rep = *it;
+    float dip_scale = image_rep.GetScale();
+
+    gfx::ShadowValues scaled_shadows;
+    for (size_t i = 0; i < shadows.size(); ++i)
+      scaled_shadows.push_back(shadows[i].GetScaled(dip_scale));
+
+    SkBitmap shadow_image = SkBitmapOperations::CreateDropShadow(
+        image_rep.sk_bitmap(),
+        scaled_shadows);
+    image.AddRepresentation(ImageSkiaRep(shadow_image,
+                                         image_rep.scale_factor()));
+  }
+
+  return image;
+}
+
 std::vector<ImageSkiaRep> ImageSkia::image_reps() const {
   if (isNull())
     return std::vector<ImageSkiaRep>();