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 8b883d2ff514f1b0a91c34bd32b2c5eea33b116c..b1eed479f9cc7c9c4d3d2ce5aabaee354271ce51 100644
--- a/content/browser/tab_contents/tab_contents.cc
+++ b/content/browser/tab_contents/tab_contents.cc
@@ -1086,10 +1086,9 @@ bool TabContents::IsSavable() {
 void TabContents::OnSavePage() {
   // If we can not save the page, try to download it.
   if (!IsSavable()) {
+    download_stats::RecordDownloadSource(
+        download_stats::INITIATED_BY_SAVE_PACKAGE_ON_NON_HTML);
     SaveURL(GetURL(), GURL());
-    download_stats::RecordDownloadCount(
-        download_stats::INITIATED_BY_SAVE_PACKAGE_FAILURE_COUNT);
-    return;
   }
 
   Stop();
@@ -1566,6 +1565,8 @@ void TabContents::OnUpdateZoomLimits(int minimum_percent,
 }
 
 void TabContents::OnSaveURL(const GURL& url) {
+  download_stats::RecordDownloadSource(
+      download_stats::INITIATED_BY_PEPPER_SAVE);
   SaveURL(url, GetURL());
 }