Create OpenClose browser test for TaskManager with necessary refactoring....

chrome/browser/task_manager_linux.cc

Index: chrome/browser/task_manager_linux.cc
===================================================================
--- chrome/browser/task_manager_linux.cc	(revision 16479)
+++ chrome/browser/task_manager_linux.cc	(working copy)
@@ -21,6 +21,7 @@
   virtual void GetSelection(std::vector<int>* selection);
   virtual void GetFocused(std::vector<int>* focused);
   virtual void OpenWindow();
+  virtual void CloseWindow();
 
   // TaskManagerModelObserver
   virtual void OnModelChanged();
@@ -41,6 +42,10 @@
   NOTIMPLEMENTED();
 }
 
+void TaskManagerViewImpl::CloseWindow() {
+  NOTIMPLEMENTED();
+}
+
 void TaskManagerViewImpl::OnModelChanged() {
   NOTIMPLEMENTED();
 }