Remove unused fields from //content.

content/browser/compositor/gpu_process_transport_factory.cc

Index: content/browser/compositor/gpu_process_transport_factory.cc
diff --git a/content/browser/compositor/gpu_process_transport_factory.cc b/content/browser/compositor/gpu_process_transport_factory.cc
index 14718e5bb3aa0b4d96513cb157839682ccc74be9..8a6c00a1b119f5f0e5da931a32e8beaba6d86edd 100644
--- a/content/browser/compositor/gpu_process_transport_factory.cc
+++ b/content/browser/compositor/gpu_process_transport_factory.cc
@@ -168,12 +168,12 @@ CreateOverlayCandidateValidator(gfx::AcceleratedWidget widget) {
       (command_line->HasSwitch(switches::kEnableHardwareOverlays) ||
        command_line->HasSwitch(switches::kOzoneTestSingleOverlaySupport))) {
     validator.reset(new BrowserCompositorOverlayCandidateValidatorOzone(
-        widget, std::move(overlay_candidates)));
+        std::move(overlay_candidates)));
   }
 #elif defined(OS_MACOSX)
   // Overlays are only supported through the remote layer API.
   if (ui::RemoteLayerAPISupported()) {
-    validator.reset(new BrowserCompositorOverlayCandidateValidatorMac(widget));
+    validator.reset(new BrowserCompositorOverlayCandidateValidatorMac());
   }
 #elif defined(OS_ANDROID)
   validator.reset(new BrowserCompositorOverlayCandidateValidatorAndroid());