Remove ListValue::Append(new {Fundamental,String}Value(...)) pattern in //tools

The raw pointer overload of ListValue::Append() is deprecated and will
be removed. Instead, code should just write:
- ListValue::AppendBoolean()
- ListValue::AppendInteger()
- ListValue::AppendDouble()
- ListValue::AppendString()

BUG=581865

Review-Url: https://codereview.chromium.org/2036013002
Cr-Commit-Position: refs/heads/master@{#397571}
10 files changed