Revert "Fix tabstrip on Windows with TabScrolling turned on"

This reverts commit e3a4fe74.

Reason for revert: Breaks scrolling by shrinking the tabstrip to fit the available space instead of allowing it to grow and become scrollable.

Original change's description:
> Fix tabstrip on Windows with TabScrolling turned on
> 
> While the widths of everything were working correctly with the tabstrip, it seems the height was not. This corrects that, and it seems to be a common pattern with other ScrollViews as well.
> 
> Bug: 1093529
> Change-Id: I31250a62c06c0534c1ab21868df2419313515563
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2252633
> Reviewed-by: Taylor Bergquist <tbergquist@chromium.org>
> Commit-Queue: Connie Wan <connily@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#780989}

TBR=tbergquist@chromium.org,connily@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1093529
Change-Id: Id7c38c06a9632df9cf062e35437047357bff0113
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2285254Reviewed-by: Taylor Bergquist <tbergquist@chromium.org>
Reviewed-by: Connie Wan <connily@chromium.org>
Commit-Queue: Taylor Bergquist <tbergquist@chromium.org>
Commit-Queue: Connie Wan <connily@chromium.org>
Cr-Commit-Position: refs/heads/master@{#786012}

chrome/browser/ui/views/frame/tab_strip_region_view.cc

@@ -5,7 +5,6 @@
 #include "chrome/browser/ui/views/frame/tab_strip_region_view.h"
 
 #include "base/bind.h"
-#include "chrome/browser/ui/layout_constants.h"
 #include "chrome/browser/ui/ui_features.h"
 #include "ui/views/controls/scroll_view.h"
 #include "ui/views/layout/flex_layout.h"
@@ -34,7 +33,6 @@ TabStrip* TabStripRegionView::AddTabStrip(std::unique_ptr<TabStrip> tab_strip) {
         AddChildView(std::make_unique<views::ScrollView>());
     tab_strip_scroll_container->SetBackgroundColor(base::nullopt);
     tab_strip_scroll_container->SetHideHorizontalScrollBar(true);
-    tab_strip_scroll_container->ClipHeightTo(0, GetLayoutConstant(TAB_HEIGHT));
     tab_strip_container_ = tab_strip_scroll_container;
     return tab_strip_scroll_container->SetContents(std::move(tab_strip));
   } else {