Revert "Roll chromium_revision 68ba4ea02a..42535d5df1 (1598147:1598261)"

This reverts commit 4420b583ec6fa525bad04e2b5c7189c7ecfb6b14.

Reason for revert: Rolling back Chromium rolls that broke CI but not CQ android device tests.

Original change's description:
> Roll chromium_revision 68ba4ea02a..42535d5df1 (1598147:1598261)
>
> Change log: https://chromium.googlesource.com/chromium/src/+log/68ba4ea02a..42535d5df1
> Full diff: https://chromium.googlesource.com/chromium/src/+/68ba4ea02a..42535d5df1
>
> Changed dependencies
> * src/build: https://chromium.googlesource.com/chromium/src/build/+log/08d96365cc..59b2d010a9
> * src/buildtools/linux64: git_revision:129ce6b9af1a93143acd8f8dea6fb8c6cb65abc9..git_revision:83c605e5dcc3db2945291da1760ca9abd6343338
> * src/buildtools/mac: git_revision:129ce6b9af1a93143acd8f8dea6fb8c6cb65abc9..git_revision:83c605e5dcc3db2945291da1760ca9abd6343338
> * src/buildtools/win: git_revision:129ce6b9af1a93143acd8f8dea6fb8c6cb65abc9..git_revision:83c605e5dcc3db2945291da1760ca9abd6343338
> * src/ios: https://chromium.googlesource.com/chromium/src/ios/+log/73655355dd..93aa68ef77
> * src/third_party: https://chromium.googlesource.com/chromium/src/third_party/+log/1df9fda10d..3aceea1e90
> * src/third_party/androidx/cipd: A6oLcxGdFmfrPoaAcVYoVYHlkB3InvLKiIKnIgmGJVcC..Mn6UxK4fOcnps2oJ1ikX7T1Nf93dtMBkX68uqIyoQ0sC
> * src/third_party/cpuinfo/src: https://chromium.googlesource.com/external/github.com/pytorch/cpuinfo.git/+log/7364b490b5..7607ca5004
> * src/third_party/eigen3/src: https://chromium.googlesource.com/external/gitlab.com/libeigen/eigen.git/+log/c4eb3c4f4c..2a2456c873
> * src/third_party/grpc/src: https://chromium.googlesource.com/external/github.com/grpc/grpc.git/+log/ee2aee8b5e..4d052614c1
> * src/third_party/r8/cipd: 6BLixpU9eIdUBP0egFPaRGM00adKPdziwUcg5ThtXFYC..AVViRP05v8_iDI-43CYldqOEnoNz2SUTr_nBxP_z-NwC
> * src/third_party/tflite/src: https://chromium.googlesource.com/external/github.com/tensorflow/tensorflow.git/+log/f920077085..d20369f4f2
> * src/third_party/xnnpack/src: https://chromium.googlesource.com/external/github.com/google/XNNPACK.git/+log/26feacc3eb..15e04ff8b6
> * src/tools: https://chromium.googlesource.com/chromium/src/tools/+log/a9a47e61f4..a06f75e8e5
> DEPS diff: https://chromium.googlesource.com/chromium/src/+/68ba4ea02a..42535d5df1/DEPS
>
> BUG=None
>
> Change-Id: Ia5cba7a6e2796ccdfa654b372fe6c348be7c42f0
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/456080
> Commit-Queue: Autoroller <chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com>
> Bot-Commit: Autoroller <chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com>
> Cr-Commit-Position: refs/heads/main@{#47124}

Bug: b/492115880
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I1a80e9dc4b46c49c604ad73fb0254db76fcfb471
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/456260
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#47135}