Convert "BUG=foo" to "(issue foo)" in push-to-trunk.sh

tools/push-to-trunk.sh

Index: tools/push-to-trunk.sh
diff --git a/tools/push-to-trunk.sh b/tools/push-to-trunk.sh
index 761b7336794ba9ab8147e497b3924d4b8c5777be..bd5d003cfdda2fc3cba185824eaa2152c48522ee 100755
--- a/tools/push-to-trunk.sh
+++ b/tools/push-to-trunk.sh
@@ -202,10 +202,14 @@ if [ $STEP -le 4 ] ; then
   for commit in $COMMITS ; do
     # Get the commit's title line.
     git log -1 $commit --format="%w(80,8,8)%s" >> "$CHANGELOG_ENTRY_FILE"
-    # Grep for "BUG=xxxx" lines in the commit message.
-    git log -1 $commit --format="%b" | grep BUG= | grep -v "BUG=$" \
-                                     | sed -e 's/^/        /' \
-                                     >> "$CHANGELOG_ENTRY_FILE"
+    # Grep for "BUG=xxxx" lines in the commit message and convert them to
+    # "(issue xxxx)".
+    git log -1 $commit --format="%B" \
+        | grep "^BUG=" | grep -v "BUG=$" \
+        | sed -e 's/^/        /' \
+        | sed -e 's/BUG=v8:\(.*\)$/(issue \1)/' \
+        | sed -e 's/BUG=\(.*\)$/(Chromium issue \1)/' \
+        >> "$CHANGELOG_ENTRY_FILE"
     # Append the commit's author for reference.
     git log -1 $commit --format="%w(80,8,8)(%an)" >> "$CHANGELOG_ENTRY_FILE"
     echo "" >> "$CHANGELOG_ENTRY_FILE"