Revert "Roll chromium_revision 73b2f9fef8..83822ea81b (753151:753288)"

This reverts commit 3a7dba6cd711f1ca380d2724d4a792266b714862.

Reason for revert: Speculative revert to investigate perf tests
failures on mobile.

Original change's description:
> Roll chromium_revision 73b2f9fef8..83822ea81b (753151:753288)
> 
> Change log: https://chromium.googlesource.com/chromium/src/+log/73b2f9fef8..83822ea81b
> Full diff: https://chromium.googlesource.com/chromium/src/+/73b2f9fef8..83822ea81b
> 
> Changed dependencies
> * src/base: https://chromium.googlesource.com/chromium/src/base/+log/0795c973af..7c83ca7825
> * src/build: https://chromium.googlesource.com/chromium/src/build/+log/88a5c9e25f..c01b08f0db
> * src/ios: https://chromium.googlesource.com/chromium/src/ios/+log/9e0b58d90f..788a3ccee9
> * src/testing: https://chromium.googlesource.com/chromium/src/testing/+log/ff5b7da935..a1fe18f629
> * src/third_party: https://chromium.googlesource.com/chromium/src/third_party/+log/fb585927dc..442dc273c8
> * src/third_party/catapult: https://chromium.googlesource.com/catapult.git/+log/054d61d117..bdb8301ab9
> * src/tools: https://chromium.googlesource.com/chromium/src/tools/+log/516912e509..ad281d6c11
> DEPS diff: https://chromium.googlesource.com/chromium/src/+/73b2f9fef8..83822ea81b/DEPS
> 
> No update to Clang.
> 
> TBR=chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com,
> BUG=None
> 
> Change-Id: Ibdb5a8cb071383a193c898da4444c08abe987eeb
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/171760
> Reviewed-by: Autoroller <chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com>
> Commit-Queue: Autoroller <chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com>
> Cr-Commit-Position: refs/heads/master@{#30888}

TBR=chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com

Change-Id: I3bc53b1828caf2a1b769020b75f87fca0fe49249
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: None
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/171802
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30898}
diff --git a/DEPS b/DEPS
index 30237de..2d5ae55 100644
--- a/DEPS
+++ b/DEPS
@@ -8,16 +8,16 @@
   # chromium waterfalls. More info at: crbug.com/570091.
   'checkout_configuration': 'default',
   'checkout_instrumented_libraries': 'checkout_linux and checkout_configuration == "default"',
-  'chromium_revision': '83822ea81b3605afa5695218dcfe9dcbc549b2a8',
+  'chromium_revision': '73b2f9fef87760cf97629c0071d3d646a89adbc0',
 }
 
 deps = {
   # TODO(kjellander): Move this to be Android-only once the libevent dependency
   # in base/third_party/libevent is solved.
   'src/base':
-    'https://chromium.googlesource.com/chromium/src/base@7c83ca782588d8ab427b1823ba9b537931150dd6',
+    'https://chromium.googlesource.com/chromium/src/base@0795c973af4b4b4f366bd8e0a218fca5200ece35',
   'src/build':
-    'https://chromium.googlesource.com/chromium/src/build@c01b08f0db5123e16de9b06a2dfbc16d6d065930',
+    'https://chromium.googlesource.com/chromium/src/build@88a5c9e25f9da307e584f7a75c7083f2e39d3bd0',
   'src/buildtools':
     'https://chromium.googlesource.com/chromium/src/buildtools@7977eb176752aeec29d888cfe8e677ac12ed1c41',
   # Gradle 4.3-rc4. Used for testing Android Studio project generation for WebRTC.
@@ -26,13 +26,13 @@
     'condition': 'checkout_android',
   },
   'src/ios': {
-    'url': 'https://chromium.googlesource.com/chromium/src/ios@788a3ccee9a4ab38cdab4a29ea22eb1508c0cf24',
+    'url': 'https://chromium.googlesource.com/chromium/src/ios@9e0b58d90ff3523cbed4d8bc7ca9f4fe15ff7efe',
     'condition': 'checkout_ios',
   },
   'src/testing':
-    'https://chromium.googlesource.com/chromium/src/testing@a1fe18f629405af01dfa64e6d7a7cc4d267e78a8',
+    'https://chromium.googlesource.com/chromium/src/testing@ff5b7da9357bba5c03138c2d4f1b195bd140b9cf',
   'src/third_party':
-    'https://chromium.googlesource.com/chromium/src/third_party@442dc273c81bdf7972e3be55ef9f034d66cee4e6',
+    'https://chromium.googlesource.com/chromium/src/third_party@fb585927dcb621a499bb0f1596fc6164959ed8c4',
 
   'src/buildtools/linux64': {
     'packages': [
@@ -123,7 +123,7 @@
   'src/third_party/breakpad/breakpad':
     'https://chromium.googlesource.com/breakpad/breakpad.git@f32b83eb08e9ee158d3037b2114357187fd45a05',
   'src/third_party/catapult':
-    'https://chromium.googlesource.com/catapult.git@bdb8301ab9c1824fca6baeb3cf7104ec67331d71',
+    'https://chromium.googlesource.com/catapult.git@054d61d117f0cff2a34dc23d0ac6f04c434e181a',
   'src/third_party/ced/src': {
     'url': 'https://chromium.googlesource.com/external/github.com/google/compact_enc_det.git@ba412eaaacd3186085babcd901679a48863c7dd5',
   },
@@ -259,7 +259,7 @@
   'src/third_party/yasm/source/patched-yasm':
     'https://chromium.googlesource.com/chromium/deps/yasm/patched-yasm.git@720b70524a4424b15fc57e82263568c8ba0496ad',
   'src/tools':
-    'https://chromium.googlesource.com/chromium/src/tools@ad281d6c1155274444479a108ff9f75175ea192f',
+    'https://chromium.googlesource.com/chromium/src/tools@516912e509f7d86087f38466de4766a368a3d590',
   'src/tools/swarming_client':
     'https://chromium.googlesource.com/infra/luci/client-py.git@cc958279ffd6853e0a1b227a7e957ca334fe56af',