Make BlobCache use independent from ANGLE_program_cache_control The decision to enable caching or not was based on the size of the cache as directed by eglProgramCacheResizeANGLE, which is incorrect for applications that only use the ANDROID_blob_cache extension. The new behavior is as follows: - If EGL_CONTEXT_PROGRAM_BINARY_CACHE_ENABLED_ANGLE is specifically requested and set to true, but the size of the cache is 0, caching is disabled for the context. - If EGL_CONTEXT_PROGRAM_BINARY_CACHE_ENABLED_ANGLE is specifically requested and set to false, caching is disabled for the context. - Otherwise, caching is left enabled for the context, although the cache possibly has a size of zero, which effectively disables it. During application execution, if the blob cache callbacks are set, the application cache will be used. Bug: 896406, angleproject:2516 Change-Id: Ic0cabda03fb6bf53994e86e3ede30afc8021d67e Reviewed-on: https://chromium-review.googlesource.com/c/1405708 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>