Switch content tests to use BrowserThreadImpl directly.

content/browser/renderer_host/render_widget_host_view_mac_unittest.mm

Index: content/browser/renderer_host/render_widget_host_view_mac_unittest.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac_unittest.mm b/content/browser/renderer_host/render_widget_host_view_mac_unittest.mm
index c6744fb4a45e7dd012413522a7bd4ba83c39f0ec..83eb175a98799c88daf3c3f2983f9aa8f1f4dd2a 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac_unittest.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac_unittest.mm
@@ -5,13 +5,15 @@
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #include "base/mac/scoped_nsautorelease_pool.h"
+#include "content/browser/browser_thread_impl.h"
 #include "content/browser/renderer_host/test_render_view_host.h"
-#include "content/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/test/cocoa_test_event_utils.h"
 #import "ui/base/test/ui_cocoa_test_helper.h"
 #include "webkit/plugins/npapi/webplugin.h"
 
+using content::BrowserThreadImpl;
+
 class RenderWidgetHostViewMacTest : public RenderViewHostTestHarness {
  public:
   RenderWidgetHostViewMacTest() : old_rwhv_(NULL), rwhv_mac_(NULL) {}
@@ -88,9 +90,9 @@ TEST_F(RenderWidgetHostViewMacTest, Basic) {
 // Regression test for http://crbug.com/60318
 TEST_F(RenderWidgetHostViewMacTest, FocusAcceleratedView) {
   // The accelerated view methods want to be called on the UI thread.
-  scoped_ptr<content::TestBrowserThread> ui_thread_(
-      new content::TestBrowserThread(BrowserThread::UI,
-                                     MessageLoop::current()));
+  scoped_ptr<BrowserThreadImpl> ui_thread_(
+      new BrowserThreadImpl(BrowserThread::UI,
+                            MessageLoop::current()));
 
   int w = 400, h = 300;
   gfx::PluginWindowHandle accelerated_handle = AddAcceleratedPluginView(w, h);
@@ -161,9 +163,9 @@ TEST_F(RenderWidgetHostViewMacTest, TakesFocusOnMouseDown) {
 // Regression test for http://crbug.com/64256
 TEST_F(RenderWidgetHostViewMacTest, TakesFocusOnMouseDownWithAcceleratedView) {
   // The accelerated view methods want to be called on the UI thread.
-  scoped_ptr<content::TestBrowserThread> ui_thread_(
-      new content::TestBrowserThread(BrowserThread::UI,
-                                     MessageLoop::current()));
+  scoped_ptr<BrowserThreadImpl> ui_thread_(
+      new BrowserThreadImpl(BrowserThread::UI,
+                            MessageLoop::current()));
 
   int w = 400, h = 300;
   gfx::PluginWindowHandle accelerated_handle = AddAcceleratedPluginView(w, h);