Restructure flushing relationship between GrContext, GrDrawingManager, and GrResourceCache.
Consolidates all flush actions into GrDrawingManager and makes GrContext::flush a passthrough.
Removes the unused and untested discard flush variation.
Replaces the indirect overbudget callback mechanism of GrResourceCache with a flag set by resource cache when it wants to flush that is checked after each draw by GrDrawContext.
Modifies GrResourceCache::notifyFlushOccurred() to take a param indicating whether it triggered the
flush that just occurred.
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Review-Url: https://codereview.chromium.org/2307053002
9 files changed