Aura: Compensate for round-off error in damage.

content/browser/renderer_host/render_widget_host_view_aura.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 693 matching lines @@
         image_transport_clients_[params_in_pixel.surface_handle]->size();
 
     // Co-ordinates come in OpenGL co-ordinate space.
     // We need to convert to layer space.
     gfx::Rect rect_to_paint = ConvertRectToDIP(this, gfx::Rect(
         params_in_pixel.x,
         surface_size_in_pixel.height() - params_in_pixel.y -
             params_in_pixel.height,
         params_in_pixel.width,
         params_in_pixel.height));
+
+    // Damage may not have been DIP aligned, so inflate damage to compensate
+    // for any round-off error.
+    rect_to_paint.Inset(-1, -1);
+    rect_to_paint.Intersect(window_->bounds());
+
     window_->SchedulePaintInRect(rect_to_paint);
 
     if (!resize_locks_.empty()) {
       // If we are waiting for the resize, fast-track the ACK.
       if (compositor->IsThreaded()) {
         // We need the compositor thread to pick up the active buffer before
         // ACKing.
         on_compositing_did_commit_callbacks_.push_back(
             base::Bind(&RenderWidgetHostViewAura::InsertSyncPointAndACK,
                        params_in_pixel.route_id,
@@ skipping 918 matching lines @@
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewAura(widget);
 }
 
 // static
 void RenderWidgetHostViewPort::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content