Do not create pending NavigationEntry when a transient one is present.

Do not create pending NavigationEntry when a transient one is present.

When an interestitial page is displayed, network requests from the existing
RenderFrameHost are blocked. However, this still allows the renderer to
send a DidStartProvisionalLoad IPC. This CL adds check whether when
processing the IPC a transient entry is present and skips creating a
pending entry. Otherwise the pending entry creation deletes the transient
entry and leades to URL spoof.

BUG=600046
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Review URL: https://codereview.chromium.org/1881023003

Cr-Commit-Position: refs/heads/master@{#387545}
(cherry picked from commit b2f82b84617fd2c1645a4a185f628f61f7741627)

Committed: https://chromium.googlesource.com/chromium/src/+/5cb7488cf703179cea5af8ce5dff08fb4b9e2be4

[nasko, 2016-04-18 17:04:43]

Description was changed from

==========
Do not create pending NavigationEntry when a transient one is present.

When an interestitial page is displayed, network requests from the existing
RenderFrameHost are blocked. However, this still allows the renderer to
send a DidStartProvisionalLoad IPC. This CL adds check whether when
processing the IPC a transient entry is present and skips creating a
pending entry. Otherwise the pending entry creation deletes the transient
entry and leades to URL spoof.

BUG=600046
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Review URL: https://codereview.chromium.org/1881023003

Cr-Commit-Position: refs/heads/master@{#387545}
(cherry picked from commit b2f82b84617fd2c1645a4a185f628f61f7741627)
==========

to

==========
Do not create pending NavigationEntry when a transient one is present.

When an interestitial page is displayed, network requests from the existing
RenderFrameHost are blocked. However, this still allows the renderer to
send a DidStartProvisionalLoad IPC. This CL adds check whether when
processing the IPC a transient entry is present and skips creating a
pending entry. Otherwise the pending entry creation deletes the transient
entry and leades to URL spoof.

BUG=600046
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Review URL: https://codereview.chromium.org/1881023003

Cr-Commit-Position: refs/heads/master@{#387545}
(cherry picked from commit b2f82b84617fd2c1645a4a185f628f61f7741627)

Committed:
https://chromium.googlesource.com/chromium/src/+/5cb7488cf703179cea5af8ce5dff...
==========

[nasko, 2016-04-18 17:04:44]

Committed patchset #1 (id:1) manually as
5cb7488cf703179cea5af8ce5dff08fb4b9e2be4 (tree was closed).