Disable region copy on ARM since it isn't supported

cc/surfaces/display.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/surfaces/display.h"
 
 #include "base/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/debug/benchmark_instrumentation.h"
 #include "cc/output/compositor_frame.h"
@@ skipping 232 matching lines @@
 
 void Display::SetMemoryPolicy(const ManagedMemoryPolicy& policy) {
   client_->SetMemoryPolicy(policy);
 }
 
 void Display::OnDraw() {
   NOTREACHED();
 }
 
 void Display::SetNeedsRedrawRect(const gfx::Rect& damage_rect) {
-  NOTREACHED();
+  aggregator_->SetFullDamageForSurface(current_surface_id_);
+  if (scheduler_)
+    scheduler_->SurfaceDamaged(current_surface_id_);
 }
 
 void Display::ReclaimResources(const CompositorFrameAck* ack) {
   NOTREACHED();
 }
 
 void Display::SetExternalDrawConstraints(
     const gfx::Transform& transform,
     const gfx::Rect& viewport,
     const gfx::Rect& clip,
@@ skipping 34 matching lines @@
 
   if (surface_id == current_surface_id_)
     UpdateRootSurfaceResourcesLocked();
 }
 
 SurfaceId Display::CurrentSurfaceId() {
   return current_surface_id_;
 }
 
 }  // namespace cc