Support plumbing LatencyInfo through the old software path.

content/renderer/render_widget.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/renderer/render_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 710 matching lines @@
     handling_input_event_ = false;
     return;
   }
 
   const char* const event_name = GetEventName(input_event->type);
   TRACE_EVENT1("renderer", "RenderWidget::OnHandleInputEvent",
                "event", event_name);
 
   if (compositor_)
     compositor_->SetLatencyInfo(latency_info);
+  else
+    latency_info_.MergeWith(latency_info);
 
   base::TimeDelta now = base::TimeDelta::FromInternalValue(
       base::TimeTicks::Now().ToInternalValue());
 
   int64 delta = static_cast<int64>(
       (now.InSecondsF() - input_event->timeStampSeconds) *
           base::Time::kMicrosecondsPerSecond);
   UMA_HISTOGRAM_CUSTOM_COUNTS("Event.Latency.Renderer", delta, 0, 1000000, 100);
   base::HistogramBase* counter_for_type =
       base::Histogram::FactoryGet(
@@ skipping 464 matching lines @@
   pending_update_params_->scroll_rect = update.scroll_rect;
   pending_update_params_->view_size = size_;
   pending_update_params_->plugin_window_moves.swap(plugin_window_moves_);
   pending_update_params_->flags = next_paint_flags_;
   pending_update_params_->scroll_offset = GetScrollOffset();
   pending_update_params_->needs_ack = true;
   pending_update_params_->scale_factor = device_scale_factor_;
   next_paint_flags_ = 0;
   need_update_rect_for_auto_resize_ = false;
 
+  if (!is_accelerated_compositing_active_)
+    pending_update_params_->latency_info = latency_info_;
+
+  latency_info_.Clear();
+
   if (update.scroll_rect.IsEmpty() &&
       !is_accelerated_compositing_active_ &&
       GetBitmapForOptimizedPluginPaint(bounds, &dib, &optimized_copy_location,
                                        &optimized_copy_rect,
                                        &dib_scale_factor)) {
     // Only update the part of the plugin that actually changed.
     optimized_copy_rect.Intersect(bounds);
     pending_update_params_->bitmap = dib->id();
     pending_update_params_->bitmap_rect = optimized_copy_location;
     pending_update_params_->copy_rects.push_back(optimized_copy_rect);
@@ skipping 1165 matching lines @@
 
   if (!context->Initialize(
           attributes,
           false /* bind generates resources */,
           CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE))
     return NULL;
   return context.release();
 }
 
 }  // namespace content