[Extensions] Clean up the handling of ExtensionHostMsg_Request

chrome/browser/extensions/api/downloads/downloads_api.cc

Index: chrome/browser/extensions/api/downloads/downloads_api.cc
diff --git a/chrome/browser/extensions/api/downloads/downloads_api.cc b/chrome/browser/extensions/api/downloads/downloads_api.cc
index 0d614aa6ee88fcef58b79d19752a02b0ae3e09ec..4f661f87460a614a39e7e0a669317df99b94bd14 100644
--- a/chrome/browser/extensions/api/downloads/downloads_api.cc
+++ b/chrome/browser/extensions/api/downloads/downloads_api.cc
@@ -1245,7 +1245,7 @@ void DownloadsAcceptDangerFunction::PromptOrWait(int download_id, int retries) {
   DownloadItem* download_item =
       GetDownload(GetProfile(), include_incognito(), download_id);
   content::WebContents* web_contents =
-      dispatcher()->delegate()->GetVisibleWebContents();
+      dispatcher()->GetVisibleWebContents();

[not at google - send to devlin, 2015/06/10 18:37:49]

I think this will fit on 1 line (and I would hope that clang-format realises
that).

[Devlin, 2015/06/10 20:59:20]

Done.

   if (InvalidId(download_item, &error_) ||
       Fault(download_item->GetState() != DownloadItem::IN_PROGRESS,
             errors::kNotInProgress, &error_) ||
@@ -1373,7 +1373,7 @@ bool DownloadsDragFunction::RunAsync() {
   DownloadItem* download_item =
       GetDownload(GetProfile(), include_incognito(), params->download_id);
   content::WebContents* web_contents =
-      dispatcher()->delegate()->GetVisibleWebContents();
+      dispatcher()->GetVisibleWebContents();
   if (InvalidId(download_item, &error_) ||
       Fault(!web_contents, errors::kInvisibleContext, &error_))
     return false;
@@ -1482,7 +1482,7 @@ bool DownloadsGetFileIconFunction::RunAsync() {
   DCHECK(icon_size == 16 || icon_size == 32);
   float scale = 1.0;
   content::WebContents* web_contents =
-      dispatcher()->delegate()->GetVisibleWebContents();
+      dispatcher()->GetVisibleWebContents();
   if (web_contents) {
     scale = ui::GetScaleFactorForNativeView(
         web_contents->GetRenderWidgetHostView()->GetNativeView());