Move command handling and updating off Browser and onto a helper object.

chrome/browser/command_updater_unittest.cc

Index: chrome/browser/command_updater_unittest.cc
===================================================================
--- chrome/browser/command_updater_unittest.cc	(revision 144460)
+++ chrome/browser/command_updater_unittest.cc	(working copy)
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #include "base/compiler_specific.h"
+#include "chrome/browser/command_observer.h"
 #include "chrome/browser/command_updater.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -18,7 +19,7 @@
 class CommandUpdaterTest : public testing::Test {
 };
 
-class TestingCommandObserverMock : public CommandUpdater::CommandObserver {
+class TestingCommandObserverMock : public CommandObserver {
  public:
   TestingCommandObserverMock() : enabled_(true) {}