Run ContentMain in a browser_test's browser process. This removes duplication of code in the browse…

content/browser/renderer_host/render_widget_host_browsertest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/content_paths.h"
 #include "content/shell/browser/shell.h"
 #include "content/test/content_browser_test.h"
 #include "content/test/content_browser_test_utils.h"
 #include "net/base/net_util.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace content {
 
 class RenderWidgetHostBrowserTest : public ContentBrowserTest {
  public:
   RenderWidgetHostBrowserTest() {}
 
-  virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
+  virtual void SetUpOnMainThread() OVERRIDE {
     ASSERT_TRUE(PathService::Get(DIR_TEST_DATA, &test_dir_));
   }
 
   void GetSnapshotFromRendererCallback(const base::Closure& quit_closure,
                                        bool* snapshot_valid,
                                        bool success,
                                        const SkBitmap& bitmap) {
     quit_closure.Run();
     EXPECT_EQ(success, true);
 
@@ skipping 33 matching lines @@
       &RenderWidgetHostBrowserTest::GetSnapshotFromRendererCallback,
       base::Unretained(this),
       run_loop.QuitClosure(),
       &snapshot_valid));
   run_loop.Run();
 
   EXPECT_EQ(snapshot_valid, true);
 }
 
 }  // namespace content