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Hash : ee4e0866
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Date : 2020-09-24T11:39:49

Vulkan: Add descriptor set allocation counters

Add descriptor set allocation counters for the following:
- ContextVk
  - Driver uniform allocations for graphics and compute pipelines.
- ProgramExecutableVk
  - ANGLE driver uniforms
  - Uniforms
  - Textures
  - Other shader resources
- UtilsVk
  - All of the UtilsVk::Function types increment the same counter

Each object's counters live within the object itself and the cumulative
total is output as part of that object's destruction. On Present, all of
the descriptor set counts are collected into a single total which is
used to update the overlay each frame.

In order to see the cumulative total output for each object, the
following GN args must be enabled:
is_debug = true
angle_enable_perf_counter_output = true

To see the descriptor set allocation overlay:
ANGLE_OVERLAY=VulkanDescriptorSetAllocations

Bug: angleproject:5067
Test: Manual verification with angle_perftests
Change-Id: Ie45fda56ade3e68bfba7bf6da9554eb05a02c6b6
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2429487
Commit-Queue: Tim Van Patten <timvp@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Charlie Lao <cclao@google.com>

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