Adds static function to return InsepectorView singleton without instancing
Adds static function to return InsepectorView singleton without instancing

Bug: none
Change-Id: I1f59cf2923e5ee8a6c2144bfcc0f81b9433eeb73
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3279446
Reviewed-by: Alex Rudenko <d8d88e7d7e77f69e23d1d1432231196fb8e02a62@chromium.org>
Commit-Queue: Andres Olivares <9d3bededfc9b98cb289557338a8f98e77d597607@chromium.org>

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