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

ui/app_list/icon_cache.cc

Index: ui/app_list/icon_cache.cc
diff --git a/ui/app_list/icon_cache.cc b/ui/app_list/icon_cache.cc
index b0b9997e6aebc9113232521827a3a0c956fc6e43..360b967728138c8239d0e5e7bfd5d398c0c12b4a 100644
--- a/ui/app_list/icon_cache.cc
+++ b/ui/app_list/icon_cache.cc
@@ -7,14 +7,21 @@
 #include "base/logging.h"
 #include "base/md5.h"
 #include "ui/gfx/size.h"
+#include "ui/gfx/screen.h"
 
 namespace {
 
 // Gets cache key based on |image| contents and desired |size|.
-std::string GetKey(const SkBitmap& image, const gfx::Size& size) {
-  SkAutoLockPixels image_lock(image);
+std::string GetKey(const gfx::ImageSkia& image, const gfx::Size& size) {
+  // TODO(xiyuan): Revisit this after ImageLoadingTracker DIP support is done.
+  ui::ScaleFactor scale_factor = gfx::Screen::IsDIPEnabled() ?
+      ui::SCALE_FACTOR_200P : ui::SCALE_FACTOR_100P;
+  const gfx::ImageSkiaRep& image_rep = image.GetRepresentation(scale_factor);
+  DCHECK(!image_rep.is_null());
+  const SkBitmap& bitmap = image_rep.sk_bitmap();
+  SkAutoLockPixels image_lock(bitmap);
   base::MD5Digest digest;
-  MD5Sum(image.getPixels(), image.getSize(), &digest);
+  MD5Sum(bitmap.getPixels(), bitmap.getSize(), &digest);
 
   return MD5DigestToBase16(digest) + "." + size.ToString();
 }
@@ -59,9 +66,9 @@ void IconCache::PurgeAllUnused() {
   }
 }
 
-bool IconCache::Get(const SkBitmap& src,
+bool IconCache::Get(const gfx::ImageSkia& src,
                     const gfx::Size& size,
-                    SkBitmap* processed) {
+                    gfx::ImageSkia* processed) {
   Cache::iterator it = cache_.find(GetKey(src, size));
   if (it == cache_.end())
     return false;
@@ -73,9 +80,9 @@ bool IconCache::Get(const SkBitmap& src,
   return true;
 }
 
-void IconCache::Put(const SkBitmap& src,
+void IconCache::Put(const gfx::ImageSkia& src,
                     const gfx::Size& size,
-                    const SkBitmap& processed) {
+                    const gfx::ImageSkia& processed) {
   const std::string key = GetKey(src, size);
   cache_[key].image = processed;
   cache_[key].used = true;