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

chrome/common/child_process_info.h

Index: chrome/common/child_process_info.h
===================================================================
--- chrome/common/child_process_info.h	(revision 12019)
+++ chrome/common/child_process_info.h	(working copy)
@@ -30,7 +30,7 @@
   // Getter to the process handle.
   base::ProcessHandle handle() const { return process_.handle(); }
 
-  int pid() const {
+  virtual int GetProcessId() const {
     if (pid_ != -1)
       return pid_;
 
@@ -95,8 +95,6 @@
   ChildProcessInfo(ProcessType type);
 
  private:
-  friend class ResourceDispatcherHostTest;
-
   ProcessType type_;
   std::wstring name_;
   mutable int pid_;  // Cache of the process id.