UpdateManager: rename UpdateCurrentConnectionAllowed into UpdateDownloadAllowed.

The signifies the *functional* nature of this policy request, instead of
dwelling on the low-level information it is evaluating.

BUG=chromium:389677
TEST=Unit tests.

Change-Id: I684ea13d4e89554b6a4d596666c18e2dbd609991
Reviewed-on: https://chromium-review.googlesource.com/206903
Tested-by: Gilad Arnold <garnold@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Gilad Arnold <garnold@chromium.org>
diff --git a/update_manager/chromeos_policy.cc b/update_manager/chromeos_policy.cc
index fc73d0d..e2de820 100644
--- a/update_manager/chromeos_policy.cc
+++ b/update_manager/chromeos_policy.cc
@@ -80,7 +80,7 @@
     case ErrorCode::kDownloadTransferError:
     case ErrorCode::kDownloadWriteError:
     case ErrorCode::kDownloadStateInitializationError:
-    case ErrorCode::kOmahaErrorInHTTPResponse: // Aggregate for HTTP errors.
+    case ErrorCode::kOmahaErrorInHTTPResponse:  // Aggregate for HTTP errors.
       LOG(INFO) << "Incrementing URL failure count due to error "
                 << chromeos_update_engine::utils::CodeToString(err_code)
                 << " (" << static_cast<int>(err_code) << ")";
@@ -301,7 +301,7 @@
 // updates over a cellular network (disabled by default). We may want to
 // revisit this semantics, allowing greater flexibility in defining specific
 // permissions over all types of networks.
-EvalStatus ChromeOSPolicy::UpdateCurrentConnectionAllowed(
+EvalStatus ChromeOSPolicy::UpdateDownloadAllowed(
     EvaluationContext* ec,
     State* state,
     string* error,