[roll] Roll chromium version:73.0.3672.0

Test: CQ

Change-Id: I2db4dbaa3cdd72a5f6a7a3c0a72176c8777fb4c2
diff --git a/tools/cipd.ensure b/tools/cipd.ensure
index 61be062..80ad1f8 100644
--- a/tools/cipd.ensure
+++ b/tools/cipd.ensure
@@ -10,8 +10,8 @@
 
 # Chromium amd64 / x64 implementation
 @Subdir third_party/chromium/arch/x64
-chromium/fuchsia/webrunner-amd64 oECjMtkq0wsEofXJo1xD1z0ZpPsWkF0Uo01tAUAKyi8C
+chromium/fuchsia/webrunner-amd64 T49cfKgwz_87USH-6kr3yc6L_ZKcup2h-d1L3Kykx-0C
 
 # Chromium arm64 / aarch64 implementation
 @Subdir third_party/chromium/arch/arm64
-chromium/fuchsia/webrunner-arm64 r-w-6D5PA2gKneo6VpPKLolvUfCJSgLoOx8jNGyqZxMC
+chromium/fuchsia/webrunner-arm64 2_hKWsYdd2Vf5cbpDym0bTOqhBEWNWOC6pbSWIchPHoC