Change WebContentsDelegate::RunFileChooser to be frame based.

content/browser/frame_host/render_frame_host_manager_browsertest.cc

Index: content/browser/frame_host/render_frame_host_manager_browsertest.cc
diff --git a/content/browser/frame_host/render_frame_host_manager_browsertest.cc b/content/browser/frame_host/render_frame_host_manager_browsertest.cc
index ae972e8f4b9030a85106be629abc2acbc67b7ba7..07d8d34b8854de4262447a575a45b52d5067bb4e 100644
--- a/content/browser/frame_host/render_frame_host_manager_browsertest.cc
+++ b/content/browser/frame_host/render_frame_host_manager_browsertest.cc
@@ -1822,15 +1822,14 @@ class FileChooserDelegate : public WebContentsDelegate {
   FileChooserDelegate(const base::FilePath& file)
       : file_(file), file_chosen_(false) {}
 
-  void RunFileChooser(WebContents* web_contents,
+  void RunFileChooser(RenderFrameHost* render_frame_host,
                       const FileChooserParams& params) override {
     // Send the selected file to the renderer process.
     FileChooserFileInfo file_info;
     file_info.file_path = file_;
     std::vector<FileChooserFileInfo> files;
     files.push_back(file_info);
-    web_contents->GetRenderViewHost()->FilesSelectedInChooser(
-        files, FileChooserParams::Open);
+    render_frame_host->FilesSelectedInChooser(files, FileChooserParams::Open);
 
     file_chosen_ = true;
   }