Fix the filtering logic for x-chrome-manage-account header

Fix the filtering logic for x-chrome-manage-account header

The current code checks if the request is loaded in a main frame and if it
is triggered by a user gesture. As per discussion with eisinger@ there is
no reliable way to associate a request with a user gesture, instead
we should check if the requested resource type is a main frame resource.

BUG=394869
Committed: https://crrev.com/564d209d5733494ca2847eef75161151e1dd0f24
Cr-Commit-Position: refs/heads/master@{#298372}

[guohui, 2014-10-06 20:28:49]

guohui@chromium.org changed reviewers:
+ rogerta@chromium.org

[guohui, 2014-10-06 20:28:49]

Hey Roger,

could you please review the CL?

Thanks,

Hui

[Roger Tawa OOO till Jul 10th, 2014-10-06 21:10:41]

lgtm

Might be able to remove include for page_transition_types.h

[guohui, 2014-10-06 21:13:47]

The CQ bit was checked by guohui@chromium.org

[commit-bot: I haz the power, 2014-10-06 21:16:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/632803002/1

[commit-bot: I haz the power, 2014-10-07 00:39:09]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-10-07 00:39:10]

Exceeded time limit waiting for builds to trigger.

[guohui, 2014-10-07 03:35:05]

The CQ bit was checked by guohui@chromium.org

[commit-bot: I haz the power, 2014-10-07 03:36:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/632803002/1

[commit-bot: I haz the power, 2014-10-07 04:48:29]

Committed patchset #1 (id:1) as e981fc1419accdf5b043f41f2b9b7893c0c535ee

[commit-bot: I haz the power, 2014-10-07 04:49:08]

Patchset 1 (id:??) landed as
https://crrev.com/564d209d5733494ca2847eef75161151e1dd0f24
Cr-Commit-Position: refs/heads/master@{#298372}