Reland of OOPIF: Call setCoreFrame on remote-to-local swaps.

Reland of OOPIF: Call setCoreFrame on remote-to-local swaps. (patchset #1 id:1 of https://codereview.chromium.org/1315543009/ )

Reason for revert:
Reland: The Android build went green one build before this revert.

Original issue's description:
> Revert of OOPIF: Call setCoreFrame on remote-to-local swaps. (patchset #4 id:60001 of https://codereview.chromium.org/1316863009/ )
> 
> Reason for revert:
> I suspect this change broke webkit_unit_tests on Nexus 4:
> All/ParameterizedWebFrameTest.RemoteToLocalSwapOnMainFrameInitializesCoreFrame/0
> All/ParameterizedWebFrameTest.RemoteToLocalSwapOnMainFrameInitializesCoreFrame/1
> All/WebFrameResizeTest.ResizeYieldsCorrectScrollAndScaleForFixedWidth/0
> All/WebFrameResizeTest.ResizeYieldsCorrectScrollAndScaleForFixedWidth/1
> All/WebFrameResizeTest.ResizeYieldsCorrectScrollAndScaleForMinimumScale/0
> All/WebFrameResizeTest.ResizeYieldsCorrectScrollAndScaleForWidthEqualsDeviceWidth/1
> All/WebFrameResizeTest.ResizeYieldsCorrectScrollAndScaleForFixedLayout/1
> 
> First failing build:
> https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Android%20%28Nexus4%29/builds/37423
> 
> Blamelist:
> http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.html?url=/trunk&range=201725:201728&mode=html
> http://test-results.appspot.com/revision_range?start=347178&end=347178
> 
> Original issue's description:
> > OOPIF: Call setCoreFrame on remote-to-local swaps.
> > 
> > This ensures that various initializion in setCoreFrame is triggered when
> > doing remote-to-local swaps.
> > 
> > BUG=525285
> > 
> > Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201726
> 
> TBR=dcheng@chromium.org,alexmos@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=525285
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201756

TBR=dcheng@chromium.org,alexmos@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=525285
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201781

[falken, 2015-09-04 07:48:11]

Created Reland of OOPIF: Call setCoreFrame on remote-to-local swaps.

[falken, 2015-09-04 07:48:47]

The CQ bit was checked by falken@chromium.org

[commit-bot: I haz the power, 2015-09-04 07:48:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1304093005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1304093005/1

[commit-bot: I haz the power, 2015-09-04 07:49:21]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201781