Remove -Wno-enum-compare-switch flag

This CL is part of
https://chromium-review.googlesource.com/c/chromium/src/+/1286016

This CL was uploaded by git cl split.

R=haraken@chromium.org

Bug: 753973
Change-Id: Ife13d645bede991ae8959759be878ed5bdf3733e
Reviewed-on: https://chromium-review.googlesource.com/c/1288156Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600707}

content/child/webthemeengine_impl_android.cc

@@ -168,8 +168,8 @@ static void GetNativeThemeExtraParams(
 
 blink::WebSize WebThemeEngineImpl::GetSize(WebThemeEngine::Part part) {
   switch (part) {
-    case ui::NativeTheme::kScrollbarHorizontalThumb:
-    case ui::NativeTheme::kScrollbarVerticalThumb: {
+    case WebThemeEngine::kPartScrollbarHorizontalThumb:
+    case WebThemeEngine::kPartScrollbarVerticalThumb: {
       // Minimum length for scrollbar thumb is the scrollbar thickness.
       ScrollbarStyle style;
       GetOverlayScrollbarStyle(&style);