Switch content tests to use BrowserThreadImpl directly.

content/browser/renderer_host/render_widget_host_unittest.cc

Index: content/browser/renderer_host/render_widget_host_unittest.cc
diff --git a/content/browser/renderer_host/render_widget_host_unittest.cc b/content/browser/renderer_host/render_widget_host_unittest.cc
index c5a5769cdb067b40400320637e1c8fb5faaa641d..450695bf9a253f86774613bbddeffef61ab46e73 100644
--- a/content/browser/renderer_host/render_widget_host_unittest.cc
+++ b/content/browser/renderer_host/render_widget_host_unittest.cc
@@ -6,6 +6,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/timer.h"
+#include "content/browser/browser_thread_impl.h"
 #include "content/browser/renderer_host/backing_store.h"
 #include "content/browser/renderer_host/test_render_view_host.h"
 #include "content/common/view_messages.h"
@@ -16,13 +17,14 @@
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "content/test/test_browser_context.h"
-#include "content/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/gfx/canvas_skia.h"
 
 using base::TimeDelta;
 
+using content::BrowserThreadImpl;
+
 using WebKit::WebInputEvent;
 using WebKit::WebMouseWheelEvent;
 
@@ -527,8 +529,7 @@ TEST_F(RenderWidgetHostTest, GetBackingStore_RepaintAck) {
 // Test that we don't paint when we're hidden, but we still send the ACK. Most
 // of the rest of the painting is tested in the GetBackingStore* ones.
 TEST_F(RenderWidgetHostTest, HiddenPaint) {
-  content::TestBrowserThread ui_thread(BrowserThread::UI,
-                                       MessageLoop::current());
+  BrowserThreadImpl ui_thread(BrowserThread::UI, MessageLoop::current());
   // Hide the widget, it should have sent out a message to the renderer.
   EXPECT_FALSE(host_->is_hidden_);
   host_->WasHidden();