[Extensions] Don't show the pending URL for chrome.tabs API navigations

[Extensions] Don't show the pending URL for chrome.tabs API navigations

For the pdf extension, treat navigations as renderer-initiated. Ideally,
we want this to become default for all extensions, but that risks
breakage.

Based on creis@'s patch at https://codereview.chromium.org/2475033002/.

BUG=660498
TEST=See bug for repro steps.

Review-Url: https://codereview.chromium.org/2492863003
Cr-Commit-Position: refs/heads/master@{#431726}
(cherry picked from commit 2097de33a1f3d04e78d93e9e2f16aad4b97e47d7)

Committed: https://chromium.googlesource.com/chromium/src/+/50cfe8d0926f013a794afe49e39cc48fe2e3848b

[Devlin, 2016-11-15 15:01:16]

Description was changed from

==========
[Extensions] Don't show the pending URL for chrome.tabs API navigations

For the pdf extension, treat navigations as renderer-initiated. Ideally,
we want this to become default for all extensions, but that risks
breakage.

Based on creis@'s patch at https://codereview.chromium.org/2475033002/.

BUG=660498
TEST=See bug for repro steps.

Review-Url: https://codereview.chromium.org/2492863003
Cr-Commit-Position: refs/heads/master@{#431726}
(cherry picked from commit 2097de33a1f3d04e78d93e9e2f16aad4b97e47d7)
==========

to

==========
[Extensions] Don't show the pending URL for chrome.tabs API navigations

For the pdf extension, treat navigations as renderer-initiated. Ideally,
we want this to become default for all extensions, but that risks
breakage.

Based on creis@'s patch at https://codereview.chromium.org/2475033002/.

BUG=660498
TEST=See bug for repro steps.

Review-Url: https://codereview.chromium.org/2492863003
Cr-Commit-Position: refs/heads/master@{#431726}
(cherry picked from commit 2097de33a1f3d04e78d93e9e2f16aad4b97e47d7)

Committed:
https://chromium.googlesource.com/chromium/src/+/50cfe8d0926f013a794afe49e39c...
==========

[Devlin, 2016-11-15 15:01:17]

Committed patchset #1 (id:1) manually as
50cfe8d0926f013a794afe49e39cc48fe2e3848b.