mojo leveldb: Get profile and leveldb connected to DOMStorageContext.

content/public/test/content_browser_test.h

Index: content/public/test/content_browser_test.h
diff --git a/content/public/test/content_browser_test.h b/content/public/test/content_browser_test.h
index 6b58d61f7f1372d1674b55fdf9f3aa1f08913ffe..97c03814897d2026b4a3f96eb4dff4b483b79748 100644
--- a/content/public/test/content_browser_test.h
+++ b/content/public/test/content_browser_test.h
@@ -11,6 +11,7 @@
 #include "content/public/test/browser_test_base.h"
 
 namespace content {
+class BrowserContext;
 class Shell;
 class ShellMainDelegate;
 
@@ -28,6 +29,9 @@ class ContentBrowserTest : public BrowserTestBase {
   void RunTestOnMainThreadLoop() override;
 
  protected:
+  // Returns the browser context for this profile.
+  BrowserContext* GetBrowserContext() const;
+
   // Creates a new window and loads about:blank.
   Shell* CreateBrowser();