Replace bad json content in cros_tree_map output.
Replace bad json content in cros_tree_map output.

BUG=chromium-os:35086
TEST=generated R21 and R24 tree maps

Change-Id: I1e9a2cc069af0691f16677ad73ee7dc9cb6e66ff
Reviewed-on: https://gerrit.chromium.org/gerrit/34882
Tested-by: Darin Petkov <78a9f901370f79bffab0f0650001fa5e6b8f6fd2@chromium.org>
Reviewed-by: Don Garrett <546ec366615570e68497e3c5df9092106a9808f4@chromium.org>
Commit-Ready: Darin Petkov <78a9f901370f79bffab0f0650001fa5e6b8f6fd2@chromium.org>

zhang0137/chromite,zhang0137/chromite,coreos/chromite,chadversary/chromiumos.chromite,zhang0137/chromite,coreos/chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,coreos/chromite,bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite