Supporting high dpi favicons in Instant Extended.

ui/gfx/favicon_size.cc

Index: ui/gfx/favicon_size.cc
diff --git a/ui/gfx/favicon_size.cc b/ui/gfx/favicon_size.cc
index d0ba48a4ccdd597f0f3e12bd77f124c276f3c425..2c850f15d42df545eac0b1a896644e966a09e16a 100644
--- a/ui/gfx/favicon_size.cc
+++ b/ui/gfx/favicon_size.cc
@@ -8,6 +8,12 @@ namespace gfx {
 
 const int kFaviconSize = 16;
 
+const int kSizeInDip = kFaviconSize;
+
+const int kSizeInDip2x = kFaviconSize * 2;
+
+const int kSizeInDip4x = kFaviconSize * 4;
+
 void CalculateFaviconTargetSize(int* width, int* height) {
   if (*width > kFaviconSize || *height > kFaviconSize) {
     // Too big, resize it maintaining the aspect ratio.