These upstream links (used in vulnerability scanning) are not needed since the references to the deps are no longer used. 
Part of simplifying metadata for the vuln scan process, context in b/248564768.

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This new blur should perform faster since it scales down the image
before blurring it. Jonah did early testing of it and found it to be
faster. Scrolling around with the blur perf bug it seems faster. It also
has a wider test bed and is hopefully easier to maintain since it
contains all of its logic for both directions.

testing: There are existing blur tests and we've backfilled more as
we've added features to this blur.

fixes flutter/flutter#131580
fixes flutter/flutter#138259

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mac_toolchain has been updated to no longer have 2 minute slowdown (flutter/flutter#138109), so unpin to use the latest version.

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…lear color. (#49038)

If we clear to transparent black, we're not forcing the pass to be constructed. Change the entity pass API so that we can tell the difference between clearing transparent black and not having a clear color.

In flutter/flutter#139571 , the app is creating a layer that is clearing to a transparent color, which is getting skipped. That invalid texture is fed into a blend which produces either black or magenta error texture.

Fixes flutter/flutter#139571

Context: cl/582573869

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2023-12-14 [email protected] [skif] Refine SkSpecialImage::asShader() API for fast constraints

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For consistency, I don't think we have any other tools with `-`'s.

I'll be honest - this seemed easier than teaching the header guard tool
how to handle `-`'s in directory names, but if you feel strongly about
it I can revert.

Includes an update for a deprecated FFI API
(see https://dart.googlesource.com/sdk/+/efb60eac5999e47853505f2e3fc3eaf19f56f495)

Part of landing #48903.

Some of these actually seem like potential owchy spots, i.e. `#ifndef FLUTTER_FLUTTER_H_`.

Reverts #48472

This is causing memory crashes in the device lab:
https://ci.chromium.org/ui/p/flutter/builders/prod/Mac_ios%20backdrop_filter_perf_ios__timeline_summary/14324/overview
```
[2023-12-14 15:55:20.660354] [STDOUT] stdout: [+1764 ms] Process 611 stopped
[2023-12-14 15:55:20.662620] [STDOUT] stdout: [   +2 ms] * thread #12, name = 'io.flutter.1.raster', stop reason = EXC_RESOURCE (RESOURCE_TYPE_MEMORY: high watermark memory limit exceeded) (limit=2098 MB)
[2023-12-14 15:55:20.662686] [STDOUT] stdout: [        ]     frame #0: 0x0000000106705e78 Flutter`void std::_LIBCPP_ABI_NAMESPACE::allocator<impeller::Command>::construct[abi:v15000]<impeller::Command, impeller::Command>(impeller::Command*, impeller::Command&&) + 8
[2023-12-14 15:55:20.662784] [STDOUT] stdout: [        ] Flutter`std::_LIBCPP_ABI_NAMESPACE::allocator<impeller::Command>::construct[abi:v15000]<impeller::Command, impeller::Command>:
[2023-12-14 15:55:20.662883] [STDOUT] stdout: [        ] ->  0x106705e78 <+8>:  str    x8, [x0]
[2023-12-14 15:55:20.662932] [STDOUT] stdout: [        ]     0x106705e7c <+12>: ldr    x8, [x1, #0x8]
[2023-12-14 15:55:20.663033] [STDOUT] stdout: [        ]     0x106705e80 <+16>: str    x8, [x0, #0x8]
[2023-12-14 15:55:20.663097] [STDOUT] stdout: [        ]     0x106705e84 <+20>: ldr    x8, [x1, #0x10]
[2023-12-14 15:55:20.663194] [STDOUT] stdout: [        ] Target 0: (Runner) stopped.
[2023-12-14 15:55:20.663309] [STDOUT] stdout: [        ] thread backtrace all
[2023-12-14 15:55:20.663403] [STDOUT] stdout: [        ] process detach
```

issue flutter/flutter#140106

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2023-12-15 [email protected] Version 3.3.0-231.0.dev

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2023-12-15 [email protected] Roll vulkan-deps from d4bd313283e0 to 65af791e6a06 (5 revisions)

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