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Make ICCProfile store the primaries and transfer function that it
read or computed directly, rather than storing a ColorSpace object.
Construct the ColorSpace object when requested, rather than storing it.

Store an approximate (or guessed) primary matrix and transfer function
for ICC_BASED ColorSpace objects. When computing the parametric
approximation of an ICC_BASED ColorSpace object, use these values
directly, rather than having to look them up from original ICCProfile.

Bug: 766736
Change-Id: I21d6dfaa38706f814f6c9dd54517806e99366113
Reviewed-on: https://chromium-review.googlesource.com/745311Reviewed-by: Fredrik Hubinette <hubbe@chromium.org>
Commit-Queue: ccameron <ccameron@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512958}