Add abstractions that let embedders drive tests of WebContents.

content/browser/site_instance_impl_unittest.cc

 // Copyright (c) 2012 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/compiler_specific.h"
 #include "base/stl_util.h"
 #include "base/string16.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/browsing_instance.h"
 #include "content/browser/child_process_security_policy_impl.h"
@@ skipping 100 matching lines @@
 class SiteInstanceTest : public testing::Test {
  public:
   SiteInstanceTest()
       : ui_thread_(BrowserThread::UI, &message_loop_),
         old_client_(NULL),
         old_browser_client_(NULL) {
   }
 
   virtual void SetUp() {
     old_client_ = content::GetContentClient();
+    old_browser_client_ = content::GetContentClient()->browser();
     content::SetContentClient(&client_);
-    old_browser_client_ = content::GetContentClient()->browser();
     content::GetContentClient()->set_browser(&browser_client_);
     url_util::AddStandardScheme(kPrivilegedScheme);
     url_util::AddStandardScheme(chrome::kChromeUIScheme);
   }
 
   virtual void TearDown() {
     content::GetContentClient()->set_browser(old_browser_client_);
     content::SetContentClient(old_client_);
   }
 
@@ skipping 481 matching lines @@
   host.reset(instance->GetProcess());
   EXPECT_TRUE(host.get() != NULL);
   EXPECT_TRUE(instance->HasProcess());
 
   EXPECT_FALSE(instance->HasWrongProcessForURL(GURL("http://evernote.com")));
   EXPECT_FALSE(instance->HasWrongProcessForURL(
       GURL("javascript:alert(document.location.href);")));
 
   EXPECT_TRUE(instance->HasWrongProcessForURL(GURL("chrome://settings")));
 }