Revert 50257 - Reland r50057. This is exactly the same except with two lines ...

Revert 50257 - Reland r50057. This is exactly the same except with two lines cherrypicked from
tony's CL 2814009 that tell make about the net_internals_resources_map.{cc,h}
files.

Load net-internals from the newly created resources.pak file.

This patch also forces the loading of the optional DataPack for const correctness reasons

Original Review: http://codereview.chromium.org/2855003

BUG=35793, 42770
TEST=none
TBR=tony

Review URL: http://codereview.chromium.org/2800014

TBR=erg@chromium.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=50260