PlzNavigate: Get StreamPrivate API to work.

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc

Index: chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
diff --git a/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc b/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
index bc8d974c05a46b49907bab0b74e34a4ce9f95984..499fdbe46c0f18c87d22d237e32b871357e15e19 100644
--- a/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
+++ b/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
@@ -64,6 +64,7 @@
 #include "content/public/browser/service_worker_context.h"
 #include "content/public/browser/stream_info.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/common/browser_side_navigation_policy.h"
 #include "content/public/common/resource_response.h"
 #include "net/base/load_flags.h"
 #include "net/base/load_timing_info.h"
@@ -185,11 +186,17 @@ void SendExecuteMimeTypeHandlerEvent(
     int render_frame_id,
     const std::string& extension_id,
     const std::string& view_id,
-    bool embedded) {
+    bool embedded,
+    const ResourceRequestInfo::WebContentsGetter& web_contents_getter) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
-  content::WebContents* web_contents =
-      tab_util::GetWebContentsByFrameID(render_process_id, render_frame_id);
+  content::WebContents* web_contents = nullptr;
+  if (content::IsBrowserSideNavigationEnabled()) {
+    web_contents = web_contents_getter.Run();
+  } else {
+    web_contents =
+        tab_util::GetWebContentsByFrameID(render_process_id, render_frame_id);
+  }
   if (!web_contents)
     return;
 
@@ -724,7 +731,8 @@ void ChromeResourceDispatcherHostDelegate::OnStreamCreated(
       base::Bind(&SendExecuteMimeTypeHandlerEvent, base::Passed(&stream),
                  request->GetExpectedContentSize(), info->GetChildID(),
                  info->GetRenderFrameID(), ix->second.extension_id,
-                 ix->second.view_id, embedded));
+                 ix->second.view_id, embedded,
+                 info->GetWebContentsGetterForRequest()));

[jam, 2016/09/14 22:49:52]

ditto: let's just pass only the WC getter

[ananta, 2016/09/15 01:49:16]

Done.

   stream_target_info_.erase(request);
 #endif
 }