Rename "install" -> "get" and "update" -> "upgrade".

sdk/lib/_internal/pub/test/get/path/nonexistent_dir_test.dart

Index: sdk/lib/_internal/pub/test/get/path/nonexistent_dir_test.dart
diff --git a/sdk/lib/_internal/pub/test/install/path/nonexistent_dir_test.dart b/sdk/lib/_internal/pub/test/get/path/nonexistent_dir_test.dart
similarity index 89%
rename from sdk/lib/_internal/pub/test/install/path/nonexistent_dir_test.dart
rename to sdk/lib/_internal/pub/test/get/path/nonexistent_dir_test.dart
index 3137dad878a0c3f7778d4c6a827896dfeba93d5e..2db4d3813c9d7ebe99efb7a18e0038c969aa4c6b 100644
--- a/sdk/lib/_internal/pub/test/install/path/nonexistent_dir_test.dart
+++ b/sdk/lib/_internal/pub/test/get/path/nonexistent_dir_test.dart
@@ -18,6 +18,6 @@ main() {
       })
     ]).create();
 
-    pubInstall(error: "Could not find package 'foo' at '$badPath'.");
+    pubGet(error: "Could not find package 'foo' at '$badPath'.");
   });
 }