Contacts Picker: Remove TODO.

After inspecting the AOSP code and talking to a member of the Android Contacts
team, it looks like there is no code path that would result in an image being
handed to our Contact Picker, without Android Contacts first decoding it in
the same way we do.

Bug: 860467
Change-Id: Ifb1c75cf0048c843644506e6d0fe4f9b886b6095
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1943181Reviewed-by: Peter Beverloo <peter@chromium.org>
Commit-Queue: Finnur Thorarinsson <finnur@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720209}

chrome/android/java/src/org/chromium/chrome/browser/contacts_picker/FetchIconWorkerTask.java

@@ -78,7 +78,6 @@ class FetchIconWorkerTask extends AsyncTask<Bitmap> {
             if (cursor.moveToFirst()) {
                 byte[] data = cursor.getBlob(0);
                 if (data != null) {
-                    // TODO(finnur): Before launching, verify images have already been re-encoded.
                     return BitmapFactory.decodeStream(new ByteArrayInputStream(data));
                 }
             }