AutoRolls include Chromium bug links

autoroll/go/repo_manager/repo_manager.go

 package repo_manager
 
 import (
         "fmt"
         "os"
         "path"
         "regexp"
         "strconv"
         "strings"
         "sync"
@@ skipping 267 matching lines @@
                 util.LogErr(r.cleanChromium())
         }()
 
         // Create the roll CL.
         if _, err := exec.RunCwd(r.chromiumDir, "git", "config", "user.name", autoroll.ROLL_AUTHOR); err != nil {
                 return 0, err
         }
         if _, err := exec.RunCwd(r.chromiumDir, "git", "config", "user.email", autoroll.ROLL_AUTHOR); err != nil {
                 return 0, err
         }
+
+        // Find Chromium bugs.
+        bugs := []string{}
+        cr := r.childRepo
+        commits, err := cr.RevList(fmt.Sprintf("%s..%s", r.lastRollRev, r.childHead))
+        if err != nil {
+                return 0, fmt.Errorf("Failed to list revisions: %s", err)
+        }
+        for _, c := range commits {
+                d, err := cr.Details(c, false)
+                if err != nil {
+                        return 0, fmt.Errorf("Failed to obtain commit details: %s", err)
+                }
+                b := util.BugsFromCommitMsg(d.Body)
+                for _, bug := range b[util.PROJECT_CHROMIUM] {
+                        bugs = append(bugs, bug)
+                }
+        }
+
+        args := []string{r.childPath, r.childHead}
+        for _, bug := range bugs {
+                args = append(args, "--bug", bug)
+        }
         if _, err := exec.RunCommand(&exec.Command{
                 Dir:  r.chromiumDir,
                 Env:  []string{fmt.Sprintf("PATH=%s:%s", r.depot_tools, os.Getenv("PATH"))},
                 Name: r.rollDep,
                 Args: []string{r.childPath, r.childHead},
         }); err != nil {
                 return 0, err
         }
         // Build the commit message, starting with the message provided by roll-dep.
         commitMsg, err := exec.RunCwd(r.chromiumDir, "git", "log", "-n1", "--format=%B", "HEAD")
@@ skipping 31 matching lines @@
         issues := ISSUE_CREATED_REGEX.FindStringSubmatch(uploadOutput)
         if len(issues) != 2 {
                 return 0, fmt.Errorf("Failed to find newly-uploaded issue number!")
         }
         return strconv.ParseInt(issues[1], 10, 64)
 }
 
 func (r *repoManager) User() string {
         return r.user
 }