Switch ChromeTestSuite to the same convention as ContentTestSuite:

content/browser/site_instance_unittest.cc

Index: content/browser/site_instance_unittest.cc
diff --git a/content/browser/site_instance_unittest.cc b/content/browser/site_instance_unittest.cc
index 858b6a438635cc1e8de61d3f8afe3216e50bab91..58bc4154e06d29169a734b091b5b4c9ecb7e1621 100644
--- a/content/browser/site_instance_unittest.cc
+++ b/content/browser/site_instance_unittest.cc
@@ -5,7 +5,6 @@
 #include "base/compiler_specific.h"
 #include "base/stl_util.h"
 #include "base/string16.h"
-#include "chrome/test/base/testing_browser_process_test.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/browsing_instance.h"
@@ -75,7 +74,7 @@ class SiteInstanceTestBrowserClient : public content::MockContentBrowserClient {
   content::ContentBrowserClient* old_browser_client_;
 };
 
-class SiteInstanceTest : public TestingBrowserProcessTest {
+class SiteInstanceTest : public testing::Test {
  public:
   SiteInstanceTest()
       : ui_thread_(BrowserThread::UI, &message_loop_),