Clean up pub's exceptions.

sdk/lib/_internal/pub/lib/src/git.dart

Index: sdk/lib/_internal/pub/lib/src/git.dart
diff --git a/sdk/lib/_internal/pub/lib/src/git.dart b/sdk/lib/_internal/pub/lib/src/git.dart
index 5ba66b2ab4f3528044465bdb218f4f4cead9b989..598627aece689e5594009695f88573b846298af6 100644
--- a/sdk/lib/_internal/pub/lib/src/git.dart
+++ b/sdk/lib/_internal/pub/lib/src/git.dart
@@ -45,8 +45,7 @@ bool _isInstalledCache;
 Future<List<String>> run(List<String> args,
     {String workingDir, Map<String, String> environment}) {
   if (!isInstalled) {
-    throw new ApplicationException(
-        "Cannot find a Git executable.\n"
+    fail("Cannot find a Git executable.\n"
         "Please ensure Git is correctly installed.");
   }
 
@@ -61,8 +60,7 @@ Future<List<String>> run(List<String> args,
 List<String> runSync(List<String> args, {String workingDir,
     Map<String, String> environment}) {
   if (!isInstalled) {
-    throw new ApplicationException(
-        "Cannot find a Git executable.\n"
+    fail("Cannot find a Git executable.\n"
         "Please ensure Git is correctly installed.");
   }