Refactor RFHM::InitRenderView to take in RenderFrameProxyHost parameter

Refactor RFHM::InitRenderView to take in RenderFrameProxyHost parameter

This CL is picking only the refactoring part of https://codereview.chromium.org/1408743005/,
which contained change in behavior as well. It was reverted due to a
potential memory leak, so I am landing the refactoring and the actual
fix separately now.

BUG=357747, 544271
Committed: https://crrev.com/1f3ecb2eb8806026b81d6c5605aba11ea1d1859d
Cr-Commit-Position: refs/heads/master@{#355566}

[nasko, 2015-10-21 22:07:41]

nasko@chromium.org changed reviewers:
+ alexmos@chromium.org

[nasko, 2015-10-21 22:07:41]

Hey Alex,
Since my previous CL was reverted due to a memory leak, I want to land the
refactoring part in a separate CL. This is just that portion.
Can you review it for me?
Thanks!
Nasko

[alexmos, 2015-10-21 22:31:36]

LGTM

[nasko, 2015-10-21 22:32:14]

The CQ bit was checked by nasko@chromium.org

[commit-bot: I haz the power, 2015-10-21 22:37:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1415303002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1415303002/1

[commit-bot: I haz the power, 2015-10-22 01:18:32]

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

[commit-bot: I haz the power, 2015-10-22 01:18:33]

Try jobs failed on following builders:
  linux_android_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_android_r...)

[nasko, 2015-10-22 16:23:11]

The CQ bit was checked by nasko@chromium.org

[commit-bot: I haz the power, 2015-10-22 16:23:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1415303002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1415303002/1

[commit-bot: I haz the power, 2015-10-22 17:30:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-22 17:31:06]

Patchset 1 (id:??) landed as
https://crrev.com/1f3ecb2eb8806026b81d6c5605aba11ea1d1859d
Cr-Commit-Position: refs/heads/master@{#355566}