Fix navigator.plugins and navigator.mimeTypes for OOPIFs.

Fix navigator.plugins and navigator.mimeTypes for OOPIFs.

Previously, Page::pluginData() returned nullptr when the Page's main
frame was a RemoteFrame.  This caused navigator.plugins and
navigator.mimeTypes to both return empty arrays from an OOPIF.

Page::pluginData() needed the main frame to run the
FrameLoader::allowPlugins check on it.  This CL moves this check to
happen on the actual LocalFrame that needs to access
Page::pluginData().

BUG=612200, 607981, 616445
Review-Url: https://codereview.chromium.org/1990343002
Cr-Commit-Position: refs/heads/master@{#394942}
(cherry picked from commit fb92f3e718335521cf454e53651235fbf30c10e2)

Committed: https://chromium.googlesource.com/chromium/src/+/bc0578a78ae310a0216210e9e6894537acb7d8e6

[alexmos, 2016-07-01 22:08:00]

Description was changed from

==========
Fix navigator.plugins and navigator.mimeTypes for OOPIFs.

Previously, Page::pluginData() returned nullptr when the Page's main
frame was a RemoteFrame.  This caused navigator.plugins and
navigator.mimeTypes to both return empty arrays from an OOPIF.

Page::pluginData() needed the main frame to run the
FrameLoader::allowPlugins check on it.  This CL moves this check to
happen on the actual LocalFrame that needs to access
Page::pluginData().

BUG=612200, 607981, 616445

Review-Url: https://codereview.chromium.org/1990343002
Cr-Commit-Position: refs/heads/master@{#394942}
(cherry picked from commit fb92f3e718335521cf454e53651235fbf30c10e2)
==========

to

==========
Fix navigator.plugins and navigator.mimeTypes for OOPIFs.

Previously, Page::pluginData() returned nullptr when the Page's main
frame was a RemoteFrame.  This caused navigator.plugins and
navigator.mimeTypes to both return empty arrays from an OOPIF.

Page::pluginData() needed the main frame to run the
FrameLoader::allowPlugins check on it.  This CL moves this check to
happen on the actual LocalFrame that needs to access
Page::pluginData().

BUG=612200, 607981, 616445

Review-Url: https://codereview.chromium.org/1990343002
Cr-Commit-Position: refs/heads/master@{#394942}
(cherry picked from commit fb92f3e718335521cf454e53651235fbf30c10e2)

Committed:
https://chromium.googlesource.com/chromium/src/+/bc0578a78ae310a0216210e9e689...
==========

[alexmos, 2016-07-01 22:08:02]

Committed patchset #1 (id:1) manually as
bc0578a78ae310a0216210e9e6894537acb7d8e6.