Enable blob cache when debugging We've had several issues with shader caches which are only implemented on Android which makes them challenging to debug. The existing BlobCache object has a default implementation that is disabled by default. When debug layers are enabled resize the default cache so that it gets used and provides behavior closer to Android. This caching will be enabled when debug layers are enabled, e.g. EGL_PLATFORM_ANGLE_DEBUG_LAYERS_ENABLED_ANGLE attribute is true. This is done for angle_end2end_tests and deqp tests. Bug: b:152292873 Change-Id: I9dcd90a1a8da88127bf8dac25031056b7279207e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2113133 Commit-Queue: Courtney Goeltzenleuchter <courtneygo@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>