Move fileapi-related files from webkit/common/ to storage/common/ and set up redirect headers

BUG=338338
TBR=darin@chromium.org

Review URL: https://codereview.chromium.org/524983002

Cr-Original-Commit-Position: refs/heads/master@{#293228}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: f55d19fce5e8521d5e269739e2e0e553dcb61bf2

whitespace_file.txt

@@ -135,3 +135,5 @@ Suddenly Domo-Kun found itself in a room filled with dazzling mirrors.
 
 A herd of wild gits appears!  Time for CQ :D
 And one more for sizes.py...
+
+Sigh.