Fix chrome.downloads.getFileIcon for hi-dpi and clarify docs.

chrome/common/extensions/api/downloads.idl

Index: chrome/common/extensions/api/downloads.idl
diff --git a/chrome/common/extensions/api/downloads.idl b/chrome/common/extensions/api/downloads.idl
index a1cb3eae424db0e78760181acbdfbc9950f2d58c..ba40f1baa6a796e076bd8df9c32063efa7b518f9 100644
--- a/chrome/common/extensions/api/downloads.idl
+++ b/chrome/common/extensions/api/downloads.idl
@@ -380,7 +380,8 @@ namespace downloads {
 
   [inline_doc] dictionary GetFileIconOptions {
     // The size of the icon.  The returned icon will be square with dimensions
-    // size * size pixels.  The default size for the icon is 32x32 pixels.
+    // size * size pixels.  The default and largest size for the icon is 32x32
+    // pixels. Valid values are 16 and 32. No other sizes are supported.

[not at google - send to devlin, 2014/01/14 19:16:24]

just "The only supported sizes are 16 and 32, anything else is an error"? or
similar.

[benjhayden, 2014/01/15 23:58:20]

Done.

     [legalValues=(16,32)] long? size;
   };