Unlike Crankshaft, Turbofan does not provide a context when trying to grow
elements. Depending on the code path we might end up updating transitioning
elements kinds in allocation sites for which we need access to the current
context. Unlike GrowCapacityAndConvert, the newly introduced GrowCapacity simply
returns false in cases where map transitions are involved.

BUG=chromium:637279

Patch by Camillo Bruni <cbruni@chromium.org>,
originally reviewed at https://codereview.chromium.org/2244983004/

Review-Url: https://codereview.chromium.org/2252393002
Cr-Commit-Position: refs/heads/master@{#38901}