AU: More graph utilities
EdgeProperties: support for listing blocks in a write-before
dependency. Blocks historically have only been listed for a
read-before dep. operator== for Extent and EdgeProperties.
Vertex: ability to mark invalid. An invalid vertex is not part of the
graph.
graph utils: Functions to add and drop dependencies.
Overloaded GetElement() to pull an element at a given index from
either a vector<Extent> or RepeatedPtrField<Extent>.
DumpGraph function, useful for debugging.
BUG=none
TEST=unittests
Review URL: http://codereview.chromium.org/3596007
4 files changed