Isolate initiation counts for downloads to their own histograms and improve

content/browser/tab_contents/tab_contents.cc

Index: content/browser/tab_contents/tab_contents.cc
diff --git a/content/browser/tab_contents/tab_contents.cc b/content/browser/tab_contents/tab_contents.cc
index 1fc4bfafe34850528a930836d3c77b2f160f64f0..66189414d3e39c2c8c8d22f3a25b160a0339c159 100644
--- a/content/browser/tab_contents/tab_contents.cc
+++ b/content/browser/tab_contents/tab_contents.cc
@@ -939,14 +939,14 @@ void TabContents::OnSavePage() {
     if (dlm && current_page_url.is_valid()) {
       DownloadSaveInfo save_info;
       save_info.prompt_for_save_location = true;
+      download_stats::RecordDownloadSource(
+          download_stats::INITIATED_BY_SAVE_PACKAGE_ON_NON_HTML);
       dlm->DownloadUrl(current_page_url,
                        GURL(),
                        "",
                        true,  // prefer_cache
                        save_info,
                        this);
-      download_stats::RecordDownloadCount(
-          download_stats::INITIATED_BY_SAVE_PACKAGE_FAILURE_COUNT);
       return;
     }
   }
@@ -1425,6 +1425,8 @@ void TabContents::OnUpdateZoomLimits(int minimum_percent,
 }
 
 void TabContents::OnSaveURL(const GURL& url) {
+  download_stats::RecordDownloadSource(
+      download_stats::INITIATED_BY_RENDERER_SAVE);
   DownloadManager* dlm = GetBrowserContext()->GetDownloadManager();
   DownloadSaveInfo save_info;
   save_info.prompt_for_save_location = true;