Stop running pub get at gclient sync time and fix build bugs

mojo/public/dart/third_party/analyzer/lib/src/generated/java_engine_io.dart

Index: mojo/public/dart/third_party/analyzer/lib/src/generated/java_engine_io.dart
diff --git a/mojo/public/dart/third_party/analyzer/lib/src/generated/java_engine_io.dart b/mojo/public/dart/third_party/analyzer/lib/src/generated/java_engine_io.dart
new file mode 100644
index 0000000000000000000000000000000000000000..749695a7a3a90e83bdf7fb8bbdd01a6317347aaf
--- /dev/null
+++ b/mojo/public/dart/third_party/analyzer/lib/src/generated/java_engine_io.dart
@@ -0,0 +1,16 @@
+library java.engine.io;
+
+import "dart:io";
+import "java_io.dart";
+
+class OSUtilities {
+  static String LINE_SEPARATOR = isWindows() ? '\r\n' : '\n';
+  static bool isWindows() => Platform.operatingSystem == 'windows';
+  static bool isMac() => Platform.operatingSystem == 'macos';
+}
+
+class FileUtilities2 {
+  static JavaFile createFile(String path) {
+    return new JavaFile(path).getAbsoluteFile();
+  }
+}