Roll chromium_revision 4ce3c08..ca4c339 (352000:352257)

Change log: https://chromium.googlesource.com/chromium/src/+log/4ce3c08..ca4c339
Full diff: https://chromium.googlesource.com/chromium/src/+/4ce3c08..ca4c339

No dependencies changed.
No update to Clang.

TBR=
CQ_EXTRA_TRYBOTS=tryserver.webrtc:win_baremetal,mac_baremetal,linux_baremetal
BUG=

Review URL: https://codereview.webrtc.org/1381743003 .

Cr-Commit-Position: refs/heads/master@{#10158}
diff --git a/.gn b/.gn
index e15f3c5..d078116 100644
--- a/.gn
+++ b/.gn
@@ -34,6 +34,7 @@
   "//build/config/linux/BUILD.gn",
   "//build/config/linux/pkg_config.gni",
   "//build/config/mac/mac_sdk.gni",
+  "//build/config/posix/BUILD.gn",
   "//build/config/win/visual_studio_version.gni",
   "//build/gn_helpers.py",
   "//build/gypi_to_gn.py",
diff --git a/DEPS b/DEPS
index 9a4bd71..5e6d6a9 100644
--- a/DEPS
+++ b/DEPS
@@ -6,7 +6,7 @@
 vars = {
   'extra_gyp_flag': '-Dextra_gyp_flag=0',
   'chromium_git': 'https://chromium.googlesource.com',
-  'chromium_revision': '4ce3c08e29d8d499efc8b94ed179f34502310881',
+  'chromium_revision': 'ca4c3396f0caa1c00462836a87623216e1ce3c4f',
 }
 
 # NOTE: Prefer revision numbers to tags for svn deps. Use http rather than