Only update layout from WebViewImpl::ContentsPreferredMinimumSize

WebViewImpl::ContentsPreferredMinimumSize only needs layout information
for MinPreferredLogicalWidth and ScrollHeight. This patch updates the
lifecycle update call to only do a layout lifecycle update, (similar to
OffsetWidth).

Bug: 868983

Change-Id: Id31b6fb884b2c182b541eab5e8baf61b17579158
Reviewed-on: https://chromium-review.googlesource.com/1153979Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579415}

third_party/blink/renderer/core/exported/web_view_impl.cc

@@ -2667,7 +2667,7 @@ WebSize WebViewImpl::ContentsPreferredMinimumSize() {
     MainFrameImpl()
         ->GetFrame()
         ->View()
-        ->UpdateLifecycleToCompositingCleanPlusScrolling();
+        ->UpdateLifecycleToLayoutClean();
   }
 
   Document* document = page_->MainFrame()->IsLocalFrame()