Switch ChromeTestSuite to the same convention as ContentTestSuite:

chrome/browser/ui/browser_list_unittest.cc

Index: chrome/browser/ui/browser_list_unittest.cc
diff --git a/chrome/browser/ui/browser_list_unittest.cc b/chrome/browser/ui/browser_list_unittest.cc
index ae354b25651c226955c2b0e4b95a0c27484a98f1..7cc6f60257a7aa110648eda4cf22bbb943fbe52e 100644
--- a/chrome/browser/ui/browser_list_unittest.cc
+++ b/chrome/browser/ui/browser_list_unittest.cc
@@ -7,6 +7,7 @@
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/browser_with_test_window_test.h"
+#include "chrome/test/base/testing_browser_process.h"
 
 typedef BrowserWithTestWindowTest BrowserListTest;
 
@@ -171,7 +172,8 @@ TEST_F(BrowserListTest, TabContentsIteratorBackgroundPrinting) {
 
   EXPECT_EQ(4U, CountAllTabs());
 
-  TestingBrowserProcess* browser_process = testing_browser_process_.get();
+  TestingBrowserProcess* browser_process =
+      static_cast<TestingBrowserProcess*>(g_browser_process);
   printing::BackgroundPrintingManager* bg_print_manager =
       browser_process->background_printing_manager();