Exposing the child process unique ID through the task manager.

chrome/browser/task_manager/task_manager.h

Index: chrome/browser/task_manager/task_manager.h
diff --git a/chrome/browser/task_manager/task_manager.h b/chrome/browser/task_manager/task_manager.h
index 2f993960b57f7262226f1ec9ec58259c51c0b059..c37afdc2061d4557ab287cacdd71160064f0c172 100644
--- a/chrome/browser/task_manager/task_manager.h
+++ b/chrome/browser/task_manager/task_manager.h
@@ -68,6 +68,7 @@ class TaskManager {
     virtual string16 GetProfileName() const = 0;
     virtual SkBitmap GetIcon() const = 0;
     virtual base::ProcessHandle GetProcess() const = 0;
+    virtual int GetUniqueChildProcessId() const = 0;
     virtual Type GetType() const = 0;
     virtual int GetRoutingID() const { return 0; }
 
@@ -376,6 +377,11 @@ class TaskManagerModel : public base::RefCountedThreadSafe<TaskManagerModel> {
   // Returns process handle for given resource.
   base::ProcessHandle GetResourceProcessHandle(int index) const;
 
+  // Returns the unique child process ID generated by Chromium, not the OS
+  // process id. This is used to identify processes internally and for
+  // extensions. It is not meant to be displayed to the user.
+  int GetUniqueChildProcessId(int index) const;
+
   // Returns the type of the given resource.
   TaskManager::Resource::Type GetResourceType(int index) const;