MacViews: Move permissions_bubble_view.cc to chrome_browser_ui_views_non_mac_sources
MacViews: Move permissions_bubble_view.cc to chrome_browser_ui_views_non_mac_sources

Follow-up to r343823 which put the site settings bubble behind
--enable-mac-views-dialogs.

The permissions bubble is separate and isn't needed for the site
settings bubble. Linking in permissions_bubble_view.cc currently
violates the ODR on Mac, because permission_bubble_cocoa.mm also has a
definition of PermissionBubbleView::Create().

The linker seems to accept this situation, and always use the Cocoa
bubble, because if it *tried* to link the views permissions bubble, it
would result in undefined references in
PermissionBubbleViewViews::GetAnchorView().

BUG=511051

Review URL: https://codereview.chromium.org/1346083002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#349297}

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