Pepper: Simplify manifest download logic.

components/nacl/renderer/manifest_downloader.cc

Index: components/nacl/renderer/manifest_downloader.cc
diff --git a/components/nacl/renderer/manifest_downloader.cc b/components/nacl/renderer/manifest_downloader.cc
index fec18d7571b087eacb52583fa822e5e03904a1c5..39d6fc5298ad43b84f8b91368f1552d4e9642686 100644
--- a/components/nacl/renderer/manifest_downloader.cc
+++ b/components/nacl/renderer/manifest_downloader.cc
@@ -14,13 +14,6 @@
 
 namespace nacl {
 
-namespace {
-// This is a pretty arbitrary limit on the byte size of the NaCl manifest file.
-// Note that the resulting string object has to have at least one byte extra
-// for the null termination character.
-const size_t kNaClManifestMaxFileBytes = 1024 * 1024;
-}  // namespace
-
 ManifestDownloader::ManifestDownloader(
     bool is_installed,
     ManifestDownloaderCallback cb)