Move several annotations to annotations package.

Move several annotations to annotations package.

Move AccessedByNative, CalledByNativeUnchecked and UsedByReflection to
annotations package where they belond. CalledByNative and NativeCall will
be moved in a separate CL since they touch every file under the sun.

BUG=None

Committed: https://crrev.com/9c45cf75d0438700b29211be14970d8068ca02c5
Cr-Commit-Position: refs/heads/master@{#324983}

[aurimas (slooooooooow), 2015-04-10 21:51:40]

aurimas@chromium.org changed reviewers:
+ nyquist@chromium.org

[aurimas (slooooooooow), 2015-04-10 21:51:41]

nyquist: PTAL

[nyquist, 2015-04-10 22:55:05]

lgtm

[aurimas (slooooooooow), 2015-04-13 20:50:57]

aurimas@chromium.org changed reviewers:
+ pauljensen@chromium.org, yfriedman@chromium.org

[aurimas (slooooooooow), 2015-04-13 20:50:58]

pauljensen:
components/cronet/*
net/*

yfriedman:
content/public/*

[pauljensen, 2015-04-13 21:55:06]

lgtm

[Yaron, 2015-04-13 23:45:27]

lgtm

[aurimas (slooooooooow), 2015-04-13 23:47:50]

The CQ bit was checked by aurimas@chromium.org

[aurimas (slooooooooow), 2015-04-13 23:47:50]

The patchset sent to the CQ was uploaded after l-g-t-m from nyquist@chromium.org
Link to the patchset: https://chromiumcodereview.appspot.com/1078343002/#ps20001
(title: "Rebase")

[commit-bot: I haz the power, 2015-04-13 23:50:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1078343002/20001

[commit-bot: I haz the power, 2015-04-14 01:42:12]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-04-14 01:43:05]

Patchset 2 (id:??) landed as
https://crrev.com/9c45cf75d0438700b29211be14970d8068ca02c5
Cr-Commit-Position: refs/heads/master@{#324983}