Fix delivery of percent full notifications from TracingController. This was...

Fix delivery of percent full notifications from TracingController. This was broken by revision 242806.

BUG=332056
TEST=Record with about:tracing

Review URL: https://codereview.chromium.org/128403006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243984 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/tracing/tracing_controller_impl.cc

@@ -430,14 +430,14 @@ bool TracingControllerImpl::GetTraceBufferPercentFull(
   pending_trace_buffer_percent_full_filters_ = trace_message_filters_;
   maximum_trace_buffer_percent_full_ = 0;
 
-  // Handle special case of zero child processes.
-  if (pending_trace_buffer_percent_full_ack_count_ == 1) {
-    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-        base::Bind(&TracingControllerImpl::OnTraceBufferPercentFullReply,
-                   base::Unretained(this),
-                   scoped_refptr<TraceMessageFilter>(),
-                   TraceLog::GetInstance()->GetBufferPercentFull()));
-  }
+  // Call OnTraceBufferPercentFullReply unconditionally for the browser process.
+  // This will result in immediate execution of the callback if there are no
+  // child processes.
+  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
+      base::Bind(&TracingControllerImpl::OnTraceBufferPercentFullReply,
+                  base::Unretained(this),
+                  scoped_refptr<TraceMessageFilter>(),
+                  TraceLog::GetInstance()->GetBufferPercentFull()));
 
   // Notify all child processes.
   for (TraceMessageFilterSet::iterator it = trace_message_filters_.begin();
@@ -768,16 +768,6 @@ void TracingControllerImpl::OnTraceBufferPercentFullReply(
         maximum_trace_buffer_percent_full_);
     pending_trace_buffer_percent_full_callback_.Reset();
   }
-
-  if (pending_trace_buffer_percent_full_ack_count_ == 1) {
-    // The last ack represents local trace, so we need to ack it now. Note that
-    // this code only executes if there were child processes.
-    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-        base::Bind(&TracingControllerImpl::OnTraceBufferPercentFullReply,
-                   base::Unretained(this),
-                   make_scoped_refptr(trace_message_filter),
-                   TraceLog::GetInstance()->GetBufferPercentFull()));
-  }
 }
 
 void TracingControllerImpl::OnWatchEventMatched() {