Hide BrowsingInstance from all but SiteInstance, as intended by design.

chrome/browser/renderer_host/chrome_render_view_host_observer.cc

Index: chrome/browser/renderer_host/chrome_render_view_host_observer.cc
diff --git a/chrome/browser/renderer_host/chrome_render_view_host_observer.cc b/chrome/browser/renderer_host/chrome_render_view_host_observer.cc
index 8f1f1f1f15c83d7f5b5de1a77aecd88a14590928..97c62903b1a5ebe4b2ec1c35a5fa2f3b7595fdd1 100644
--- a/chrome/browser/renderer_host/chrome_render_view_host_observer.cc
+++ b/chrome/browser/renderer_host/chrome_render_view_host_observer.cc
@@ -14,7 +14,6 @@
 #include "chrome/common/extensions/extension_messages.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/url_constants.h"
-#include "content/browser/browsing_instance.h"
 #include "content/browser/child_process_security_policy.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/render_view_host.h"
@@ -27,7 +26,7 @@ ChromeRenderViewHostObserver::ChromeRenderViewHostObserver(
       predictor_(predictor) {
   SiteInstance* site_instance = render_view_host->site_instance();
   profile_ = Profile::FromBrowserContext(
-      site_instance->browsing_instance()->browser_context());
+      site_instance->GetBrowserContext());
 
   InitRenderViewHostForExtensions();
 }