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

mojo/public/dart/third_party/logging/CHANGELOG.md

Index: mojo/public/dart/third_party/logging/CHANGELOG.md
diff --git a/mojo/public/dart/third_party/logging/CHANGELOG.md b/mojo/public/dart/third_party/logging/CHANGELOG.md
new file mode 100644
index 0000000000000000000000000000000000000000..d04354d5b6906d878f2a4a6fccd9e631823e0add
--- /dev/null
+++ b/mojo/public/dart/third_party/logging/CHANGELOG.md
@@ -0,0 +1,26 @@
+## 0.11.1+1
+
+* Include default error with the auto-generated stack traces.
+
+## 0.11.1
+
+* Add support for automatically logging the stack trace on error messages. Note
+  this can be expensive, so it is off by default.
+
+## 0.11.0
+
+* Revert change in `0.10.0`. `stackTrace` must be an instance of `StackTrace`.
+  Use the `Trace` class from the [stack_trace package][] to convert strings.
+
+[stack_trace package]: https://pub.dartlang.org/packages/stack_trace
+
+## 0.10.0
+
+* Change type of `stackTrace` from `StackTrace` to `Object`.
+
+## 0.9.3
+
+* Added optional `LogRecord.zone` field.
+
+* Record current zone (or user specified zone) when creating new `LogRecord`s.
+