Add more tests for BazelPackageUriResolver.resolveAbsolute().

pkg/analyzer/lib/src/generated/bazel.dart

Index: pkg/analyzer/lib/src/generated/bazel.dart
diff --git a/pkg/analyzer/lib/src/generated/bazel.dart b/pkg/analyzer/lib/src/generated/bazel.dart
index 8d9858f5b48ac6a5f938c8f84463e181196bafe9..ae493a744e270fa34e055f712ee30538e15bfcd8 100644
--- a/pkg/analyzer/lib/src/generated/bazel.dart
+++ b/pkg/analyzer/lib/src/generated/bazel.dart
@@ -73,9 +73,9 @@ class BazelPackageUriResolver extends UriResolver {
       String filePath = fileUriPart.replaceAll('/', _context.separator);
 
       if (packageName.indexOf('.') == -1) {
-        String path =
-            _context.join('third_party', 'dart', packageName, 'lib', filePath);
-        File file = _workspace.getFile(path);
+        String path = _context.join(_workspace.root, 'third_party', 'dart',
+            packageName, 'lib', filePath);
+        File file = _workspace.findFile(path);
         return file?.createSource(uri);
       } else {
         String packagePath = packageName.replaceAll('.', _context.separator);
@@ -164,14 +164,6 @@ class BazelWorkspace {
   }
 
   /**
-   * Return the file for the given [pathInWorkspace]. The file is returned even
-   * if it does not exist.
-   */
-  File getFile(String pathInWorkspace) {
-    return provider.getFile(provider.pathContext.join(root, pathInWorkspace));
-  }
-
-  /**
    * Find the Bazel workspace that contains the given [path].
    *
    * Return `null` if a workspace markers, such as the `WORKSPACE` file, or