Revert 72095 - Attribute orphaned or anonymous network usage to the Browser resources.

BUG=47955,69883
TEST=When a tab is closed with a download in-progress and Task Manager displayed, the network activity is reflected in the Browser resource's Network total.

Review URL: http://codereview.chromium.org/6383002
Patch from James Weatherall <wez@chromium.org>.

TBR=thakis@chromium.org
Review URL: http://codereview.chromium.org/6341006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72096 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/task_manager/task_manager.cc

@@ -845,16 +845,10 @@ void TaskManagerModel::BytesRead(BytesReadParam param) {
     if (resource)
       break;
   }
-
   if (resource == NULL) {
-    // We can't match a resource to the notification.  That might mean the
-    // tab that started a download was closed, or the request may have had
-    // no originating resource associated with it in the first place.
-    // We attribute orphaned/unaccounted activity to the Browser process.
-    CHECK(param.origin_child_id != base::GetCurrentProcId());
-    param.origin_child_id = base::GetCurrentProcId();
-    param.render_process_host_child_id = param.routing_id = -1;
-    BytesRead(param);
+    // We may not have that resource anymore (example: close a tab while a
+    // a network resource is being retrieved), in which case we just ignore the
+    // notification.
     return;
   }
 
@@ -893,15 +887,18 @@ void TaskManagerModel::OnJobRedirect(net::URLRequestJob* job,
 
 void TaskManagerModel::OnBytesRead(net::URLRequestJob* job, const char* buf,
                                    int byte_count) {
-  // Only net::URLRequestJob instances created by the ResourceDispatcherHost
-  // have a render view associated.  All other jobs will have -1 returned for
-  // the render process child and routing ids - the jobs may still match a
-  // resource based on their origin id, otherwise BytesRead() will attribute
-  // the activity to the Browser resource.
   int render_process_host_child_id = -1, routing_id = -1;
-  ResourceDispatcherHost::RenderViewForRequest(job->request(),
+  if (!ResourceDispatcherHost::RenderViewForRequest(job->request(),
                                                &render_process_host_child_id,
-                                               &routing_id);
+                                               &routing_id)) {
+    // Only net::URLRequestJob instances created by the ResourceDispatcherHost
+    // have a render view associated.  Jobs from components such as the
+    // SearchProvider for autocomplete, have no associated view, so we can't
+    // correctly attribute the bandwidth they consume.
+    // TODO(wez): All jobs' resources should ideally be accountable, even if
+    // only by contributing to the Browser process' stats.
+    return;
+  }
 
   // This happens in the IO thread, post it to the UI thread.
   int origin_child_id =