Incrementing VERSION to 49.0.2623.20

Cr-Commit-Position: refs/branch-heads/2623@{#77}
Cr-Branched-From: 92d77538a86529ca35f9220bd3cd512cbea1f086-refs/heads/master@{#369907}
diff --git a/chrome/VERSION b/chrome/VERSION
index 1d409e6b..8eab91be 100644
--- a/chrome/VERSION
+++ b/chrome/VERSION
@@ -1,4 +1,4 @@
 MAJOR=49
 MINOR=0
 BUILD=2623
-PATCH=19
+PATCH=20