Extensions: Pull duplicated functionality into ExtensionsTest fixture.

content/public/test/test_browser_context.h

Index: content/public/test/test_browser_context.h
diff --git a/content/public/test/test_browser_context.h b/content/public/test/test_browser_context.h
index 41af84b31d888ac9e399c7b0584fb46378383df0..ec4c5091c93a1794a789e2339048bd5956224389 100644
--- a/content/public/test/test_browser_context.h
+++ b/content/public/test/test_browser_context.h
@@ -35,6 +35,10 @@ class TestBrowserContext : public BrowserContext {
       std::unique_ptr<PermissionManager> permission_manager);
   net::URLRequestContextGetter* GetRequestContext();
 
+  // Allow clients to make this an incognito context.
+  void SetOffTheRecord(bool is_off_the_record);

[sky, 2017/04/05 02:56:55]

set_is_off_the_record() and inline.

[karandeepb, 2017/04/05 20:25:48]

Done.

+
+  // BrowserContext implementation.
   base::FilePath GetPath() const override;
   std::unique_ptr<ZoomLevelDelegate> CreateZoomLevelDelegate(
       const base::FilePath& partition_path) override;
@@ -68,6 +72,7 @@ class TestBrowserContext : public BrowserContext {
   std::unique_ptr<MockSSLHostStateDelegate> ssl_host_state_delegate_;
   std::unique_ptr<PermissionManager> permission_manager_;
   std::unique_ptr<MockBackgroundSyncController> background_sync_controller_;
+  bool is_off_the_record_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(TestBrowserContext);
 };