Add "frame to navigate" to NavigationEntry and plumb it to the RenderViewImpl

This allows for navigating a specific frame from the browser. This is required
for running layout tests.

BUG=171391
TEST=RenderViewImplTest.NavigateFrame
[email protected],[email protected]

Review URL: https://codereview.chromium.org/12052023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@178552 0039d316-1c4b-4281-b951-d872f2087c98
10 files changed