[task scheduler] Move files from build_scheduler/ to task_scheduler/

task_scheduler/go/scheduling/task_candidate.go

-package task_scheduler
+package scheduling
 
 import (
         "fmt"
         "path"
         "strings"
 
         swarming_api "github.com/luci/luci-go/common/api/swarming/swarming/v1"
-        "go.skia.org/infra/build_scheduler/go/db"
         "go.skia.org/infra/go/isolate"
         "go.skia.org/infra/go/swarming"
+        "go.skia.org/infra/task_scheduler/go/db"
 )
 
 // taskCandidate is a struct used for determining which tasks to schedule.
 type taskCandidate struct {
         Commits        []string
         IsolatedInput  string
         IsolatedHashes []string
         Name           string
         Repo           string
         Revision       string
@@ skipping 102 matching lines @@
                         Dimensions:           dims,
                         ExecutionTimeoutSecs: int64(swarming.RECOMMENDED_HARD_TIMEOUT.Seconds()),
                         InputsRef: &swarming_api.SwarmingRpcsFilesRef{
                                 Isolated:       c.IsolatedInput,
                                 Isolatedserver: isolate.ISOLATE_SERVER_URL,
                                 Namespace:      isolate.DEFAULT_NAMESPACE,
                         },
                         IoTimeoutSecs: int64(swarming.RECOMMENDED_IO_TIMEOUT.Seconds()),
                 },
                 Tags: db.TagsForTask(c.Name, id, c.TaskSpec.Priority, c.Repo, c.Revision, dimsMap),
-                User: "skia-build-scheduler",
+                User: "skia-task-scheduler",
         }
 }
 
 // allDepsMet determines whether all dependencies for the given task candidate
 // have been satisfied, and if so, returns their isolated outputs.
 func (c *taskCandidate) allDepsMet(cache db.TaskCache) (bool, []string, error) {
         isolatedHashes := make([]string, 0, len(c.TaskSpec.Dependencies))
         for _, depName := range c.TaskSpec.Dependencies {
                 d, err := cache.GetTaskForCommit(c.Repo, c.Revision, depName)
                 if err != nil {
@@ skipping 13 matching lines @@
 // taskCandidateSlice is an alias used for sorting a slice of taskCandidates.
 type taskCandidateSlice []*taskCandidate
 
 func (s taskCandidateSlice) Len() int { return len(s) }
 func (s taskCandidateSlice) Swap(i, j int) {
         s[i], s[j] = s[j], s[i]
 }
 func (s taskCandidateSlice) Less(i, j int) bool {
         return s[i].Score > s[j].Score // candidates sort in decreasing order.
 }