Adding an equals method for KeyValuePair for easier testing.

Adding an equals method for KeyValuePair for easier testing.

With this we can write stuff like

assertThat(result.mandatory,
    hasItem(new KeyValuePair("minWidth", "1280")));

The above will currently fail because the object falls back to ==.

BUG=None

Committed: https://crrev.com/7ab5f801dd8d6bc018b59d41877f44ec4ab19d15
Cr-Commit-Position: refs/heads/master@{#9494}

[phoglund, 2015-06-23 15:46:03]

phoglund@webrtc.org changed reviewers:
+ glaznev@webrtc.org

[AlexG, 2015-06-23 20:22:54]

lgtm

[phoglund, 2015-06-24 07:34:36]

The CQ bit was checked by phoglund@webrtc.org

[commit-bot: I haz the power, 2015-06-24 07:34:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1193883006/20001

[commit-bot: I haz the power, 2015-06-24 08:11:52]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-06-24 08:12:02]

Patchset 2 (id:??) landed as
https://crrev.com/7ab5f801dd8d6bc018b59d41877f44ec4ab19d15
Cr-Commit-Position: refs/heads/master@{#9494}