Bug 1629732 - Fix non-unified build errors in layout/generic. r=tnikkel

Differential Revision: https://phabricator.services.mozilla.com/D71122

--HG--
extra : moz-landing-system : lando

layout/generic/nsBlockFrame.cpp

@@ -17,6 +17,7 @@
 #include "mozilla/DebugOnly.h"
 #include "mozilla/Maybe.h"
 #include "mozilla/PresShell.h"
+#include "mozilla/StaticPrefs_browser.h"
 #include "mozilla/StaticPrefs_layout.h"
 #include "mozilla/ToString.h"
 #include "mozilla/UniquePtr.h"

layout/generic/nsTextFrame.cpp

@@ -20,6 +20,7 @@
 #include "mozilla/PresShell.h"
 #include "mozilla/StaticPrefs_layout.h"
 #include "mozilla/StaticPrefs_svg.h"
+#include "mozilla/StaticPresData.h"
 #include "mozilla/TextEditor.h"
 #include "mozilla/TextEvents.h"
 #include "mozilla/BinarySearch.h"