Update binary size milestone reports for M79.

Change-Id: Ie5427f4c9602502633b308ce9e89c7e7fd62e01b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1881270
Commit-Queue: Eric Stevenson <estevenson@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Auto-Submit: Eric Stevenson <estevenson@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709473}

tools/binary_size/generate_milestone_reports.py

@@ -69,8 +69,9 @@ _DESIRED_VERSIONS = [
     '74.0.3729.112',
     '75.0.3770.143',
     '76.0.3809.132',
-    '77.0.3865.73',  # Beta
-    '78.0.3904.8',  # Also Beta
+    '77.0.3865.115',
+    '78.0.3904.62',
+    '79.0.3945.2',  # Canary
 ]