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This patch uses single BytesInstruction Courgette ops to point to long stretches of the binary file, instead of using one ByteInstruction op, which copies one byte at a time.  This reduces memory usages for very large files, since less data is copied, and fewer Instruction classes are constructed.

BUG=266068

Review URL: https://chromiumcodereview.appspot.com/22728002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@217138 0039d316-1c4b-4281-b951-d872f2087c98