Fix single-process ui test failures from my previous change. The problem was...

chrome/browser/task_manager_resource_providers.cc

Index: chrome/browser/task_manager_resource_providers.cc
===================================================================
--- chrome/browser/task_manager_resource_providers.cc	(revision 12019)
+++ chrome/browser/task_manager_resource_providers.cc	(working copy)
@@ -264,7 +264,7 @@
       network_usage_support_(false) {
   // We cache the process id because it's not cheap to calculate, and it won't
   // be available when we get the plugin disconnected notification.
-  pid_ = child_proc.pid();
+  pid_ = child_proc.GetProcessId();
   if (!default_icon_) {
     ResourceBundle& rb = ResourceBundle::GetSharedInstance();
     default_icon_ = rb.GetBitmapNamed(IDR_PLUGIN);