over to Khushal who has been working on this.

 Issue 660975  has been merged into this issue.

Handling of bitmaps is in but everything is done at-raster right now. 2 things that remain:

1) Create upload task without a decode dependency instead of doing it at-raster.

2) Make sure we save the result of color conversion for greater than max texture size image.

I presume for bitmap images, you mean non-lazy decoded images ?

So for "1" we shouldnt skip the the upload here, 
https://cs.chromium.org/chromium/src/cc/tiles/gpu_image_decode_cache.cc?type=cs&q=GetTaskForImageAndRefInternal&sq=package:chromium&l=664

But, i couldnt find any cond when we will not use the deferred img decoding (lazy decode) https://cs.chromium.org/chromium/src/third_party/WebKit/Source/platform/graphics/BitmapImage.cpp?type=cs&l=179

Is there some use case when we are using non-lazy decode ?

These images are not coming from BitmapImage, you can create an SkImage backed by a SkBitmap. It would be better to use upload tasks for them instead of doing the upload at-raster. And yes, you should be able to do that by not skipping the upload task in GetTaskForImageAndRefInternal.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ce15d2f4607d6db583533c55999c8610ebb5e31f

commit ce15d2f4607d6db583533c55999c8610ebb5e31f
Author: Khushal <khushalsagar@chromium.org>
Date: Fri May 04 23:47:41 2018

cc: Cache color converted bitmaps > max_texture_size in GpuCache.

Ensure that we cache the result of color conversion in the
GpuImageDecodeCache for images larger than max_texture_size, which are
color converted on the cpu during scaling.

R=ericrk@chromium.org

Bug:  791828 ,  759188 
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I0940e516ef6b36ccac961c1c15057eee2c73d64e
Reviewed-on: https://chromium-review.googlesource.com/1041465
Commit-Queue: Khushal <khushalsagar@chromium.org>
Reviewed-by: Eric Karl <ericrk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556257}
[modify] https://crrev.com/ce15d2f4607d6db583533c55999c8610ebb5e31f/cc/tiles/gpu_image_decode_cache.cc
[modify] https://crrev.com/ce15d2f4607d6db583533c55999c8610ebb5e31f/cc/tiles/gpu_image_decode_cache.h
[modify] https://crrev.com/ce15d2f4607d6db583533c55999c8610ebb5e31f/cc/tiles/gpu_image_decode_cache_unittest.cc