This reverts commit 699bcde0.
Reason for revert: Breaking GLES2WebGLDecoderPassthroughTest.DrawArraysInstancedANGLEEnablement. Here is a sample build : https://ci.chromium.org/p/chromium/builders/ci/Win10%20FYI%20x64%20Release%20%28NVIDIA%29/4240
Original change's description:
> Feedback Loop Redesign 2/3: Track bound FBOs in Texture.
>
> Currently we track feedback loops by counting the times a Texture is
> bound as a sampler or image in a particular context. This is a bit
> tricky because Texture bindings change frequently. Relative to the
> number of times we need to check for a feedback loop this causes excess
> overhead.
>
> Usually Framebuffers have a low number of Textures bound (in many cases
> just 1). And Textures aren't usually bound to many different FBOs. So
> instead of counting the number of times a Texture is bound as a sampler
> or image we will track the Framebuffers that the Texture is bound to.
>
> This CL adds a small vector class to gl::Texture which tracks all the
> Framebufer Serials of its bound Framebuffers. We can use this set to
> quickly check if there's any potential feedback loop between the a FBO
> and this Texture.
>
> We also update the feedback loop check to use this new method. We will
> be able to remove the old counting method when we switch the Vulkan
> feedback loop handling to use the new tracking in this CL.
>
> Bug: angleproject:4500
> Bug: angleproject:4959
> Change-Id: I84a2f0ed8480d1da63d5879e0e56a8be4af4e735
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2358850
> Reviewed-by: Tobin Ehlis <tobine@google.com>
> Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
> Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
> Commit-Queue: Jamie Madill <jmadill@chromium.org>
TBR=tobine@google.com,courtneygo@google.com,jonahr@google.com,jmadill@chromium.org
Change-Id: Ica795036895652add37ac8ed319031f9d5a321ac
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:4500
Bug: angleproject:4959
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2365077Reviewed-by: Khushal <khushalsagar@chromium.org>
Commit-Queue: Khushal <khushalsagar@chromium.org>
