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The resulting JSON is equivalent, but now everything is smashed into one line.

This shaves 30% off the size of the NetLog dumps.

BUG=132160


Review URL: https://chromiumcodereview.appspot.com/12226132

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182207 0039d316-1c4b-4281-b951-d872f2087c98