Merge "Remove some comments regarding caching protected buffers" into main

    // If we were to support caching protected buffers then we will need to switch the

    // currently bound context if we are not already using the protected context (and subsequently

    // switch back after the buffer is cached).  However, for non-protected content we can bind

    // the texture in either GL context because they are initialized with the same share_context

    // which allows the texture state to be shared between them.

    // switch back after the buffer is cached).

    auto context = getActiveContext();

    auto& cache = mTextureCache;

    // Number of external holders of ExternalTexture references, per GraphicBuffer ID.

    std::unordered_map<GraphicBufferId, int32_t> mGraphicBufferExternalRefs

            GUARDED_BY(mRenderingMutex);

    // For GL, this cache is shared between protected and unprotected contexts. For Vulkan, it is

    // only used for the unprotected context, because Vulkan does not allow sharing between

    // contexts, and protected is less common.

    std::unordered_map<GraphicBufferId, std::shared_ptr<AutoBackendTexture::LocalRef>> mTextureCache

            GUARDED_BY(mRenderingMutex);

    std::unordered_map<shaders::LinearEffect, sk_sp<SkRuntimeEffect>, shaders::LinearEffectHasher>