Add audio signal to the ResourceScheduler.

content/browser/renderer_host/render_view_host_impl.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_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 148 matching lines @@
   return static_cast<RenderViewHostImpl*>(RenderWidgetHostImpl::From(widget));
 }
 
 RenderViewHostImpl::RenderViewHostImpl(
     SiteInstance* instance,
     RenderViewHostDelegate* delegate,
     RenderWidgetHostDelegate* widget_delegate,
     int routing_id,
     int main_frame_routing_id,
     bool swapped_out,
-    bool hidden)
+    bool hidden,
+    bool has_render_process_host_impl)
     : RenderWidgetHostImpl(widget_delegate,
                            instance->GetProcess(),
                            routing_id,
                            hidden),
       frames_ref_count_(0),
       delegate_(delegate),
       instance_(static_cast<SiteInstanceImpl*>(instance)),
       waiting_for_drag_context_response_(false),
       enabled_bindings_(0),
       page_id_(-1),
       is_active_(!swapped_out),
       is_swapped_out_(swapped_out),
       main_frame_routing_id_(main_frame_routing_id),
       run_modal_reply_msg_(NULL),
       run_modal_opener_id_(MSG_ROUTING_NONE),
       is_waiting_for_close_ack_(false),
       sudden_termination_allowed_(false),
       render_view_termination_status_(base::TERMINATION_STATUS_STILL_RUNNING),
       virtual_keyboard_requested_(false),
       is_focused_element_editable_(false),
       updating_web_preferences_(false),
       weak_factory_(this) {
   DCHECK(instance_.get());
   CHECK(delegate_);  // http://crbug.com/82827
 
   GetProcess()->EnableSendQueue();
 
   if (ResourceDispatcherHostImpl::Get()) {
+    bool has_active_audio = false;
+    if (has_render_process_host_impl) {
+      scoped_refptr<AudioRendererHost> arh =
+          static_cast<RenderProcessHostImpl*>(GetProcess())
+              ->audio_renderer_host();
+      if (arh.get())
+        has_active_audio = arh->RenderViewHasActiveAudio(GetRoutingID());
+    }
     BrowserThread::PostTask(
-        BrowserThread::IO, FROM_HERE,
+        BrowserThread::IO,
+        FROM_HERE,
         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostCreated,
                    base::Unretained(ResourceDispatcherHostImpl::Get()),
-                   GetProcess()->GetID(), GetRoutingID(), !is_hidden()));
+                   GetProcess()->GetID(),
+                   GetRoutingID(),
+                   !is_hidden(),
+                   has_active_audio));
   }

[jam, 2014/10/01 20:31:38]

actually, now that I look at this some more. how about we move all this code in
the constructor to the Init method? the coding style does say to avoid doing
work in the constructor.

then if the Init method isn't called by the unittest, we're good to go?

-
 #if defined(ENABLE_BROWSER_CDMS)
   media_web_contents_observer_.reset(new MediaWebContentsObserver(this));
 #endif
 }
 
 RenderViewHostImpl::~RenderViewHostImpl() {
   if (ResourceDispatcherHostImpl::Get()) {
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE,
         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostDeleted,
@@ skipping 1177 matching lines @@
   FrameTree* frame_tree = delegate_->GetFrameTree();
 
   frame_tree->ResetForMainFrameSwap();
 }
 
 void RenderViewHostImpl::SelectWordAroundCaret() {
   Send(new ViewMsg_SelectWordAroundCaret(GetRoutingID()));
 }
 
 }  // namespace content