diff --git a/engine/src/flutter/build/config/compiler/BUILD.gn b/engine/src/flutter/build/config/compiler/BUILD.gn
index 90528ac5a1f..04d4bd9c5f5 100644
--- a/engine/src/flutter/build/config/compiler/BUILD.gn
+++ b/engine/src/flutter/build/config/compiler/BUILD.gn
@@ -932,12 +932,7 @@ config("chromium_code") {
   } else {
     cflags = [
       "-Wall",
-
-      # GCC turns on -Wsign-compare for C++ under -Wall, but clang doesn't,
-      # so we specify it explicitly.
-      # TODO(fischman): remove this if http://llvm.org/PR10448 obsoletes it.
-      # http://code.google.com/p/chromium/issues/detail?id=90453
-      "-Wsign-compare",
+      "-Wextra",
     ]
 
     # In Chromium code, we define __STDC_foo_MACROS in order to get the
diff --git a/engine/src/flutter/flow/layers/layer.h b/engine/src/flutter/flow/layers/layer.h
index 910893791bd..d322208617e 100644
--- a/engine/src/flutter/flow/layers/layer.h
+++ b/engine/src/flutter/flow/layers/layer.h
@@ -64,7 +64,7 @@ class Layer {
   void set_parent(ContainerLayer* parent) { parent_ = parent; }
 
   // subclasses should assume this will be true by the time Paint() is called
-  const bool has_paint_bounds() const { return has_paint_bounds_; }
+  bool has_paint_bounds() const { return has_paint_bounds_; }
 
   const SkRect& paint_bounds() const {
     DCHECK(has_paint_bounds_);