Record type of content being downloaded.

BUG=None
TEST=None


Review URL: http://codereview.chromium.org/7538007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@95153 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 80 insertions, 0 deletions

diff --git a/chrome/browser/download/download_util.cc b/chrome/browser/download/download_util.cc
index e1db3ff..821624d 100644
--- a/chrome/browser/download/download_util.cc
+++ b/chrome/browser/download/download_util.cc
@@ -392,6 +392,82 @@ void RecordDownloadInterrupted(int error, int64 received, int64 total) {
   UMA_HISTOGRAM_BOOLEAN("Download.InterruptedUnknownSize", unknown_size);
 }
 
+namespace {
+
+enum DownloadContent {
+  DOWNLOAD_CONTENT_UNRECOGNIZED = 0,
+  DOWNLOAD_CONTENT_TEXT = 1,
+  DOWNLOAD_CONTENT_IMAGE = 2,
+  DOWNLOAD_CONTENT_AUDIO = 3,
+  DOWNLOAD_CONTENT_VIDEO = 4,
+  DOWNLOAD_CONTENT_OCTET_STREAM = 5,
+  DOWNLOAD_CONTENT_PDF = 6,
+  DOWNLOAD_CONTENT_DOC = 7,
+  DOWNLOAD_CONTENT_XLS = 8,
+  DOWNLOAD_CONTENT_PPT = 9,
+  DOWNLOAD_CONTENT_ARCHIVE = 10,
+  DOWNLOAD_CONTENT_EXE = 11,
+  DOWNLOAD_CONTENT_DMG = 12,
+  DOWNLOAD_CONTENT_CRX = 13,
+  DOWNLOAD_CONTENT_MAX = 14,
+};
+
+struct MimeTypeToDownloadContent {
+  const char* mime_type;
+  DownloadContent download_content;
+};
+
+static MimeTypeToDownloadContent kMapMimeTypeToDownloadContent[] = {
+  {"application/octet-stream", DOWNLOAD_CONTENT_OCTET_STREAM},
+  {"binary/octet-stream", DOWNLOAD_CONTENT_OCTET_STREAM},
+  {"application/pdf", DOWNLOAD_CONTENT_PDF},
+  {"application/msword", DOWNLOAD_CONTENT_DOC},
+  {"application/vnd.ms-excel", DOWNLOAD_CONTENT_XLS},
+  {"application/vns.ms-powerpoint", DOWNLOAD_CONTENT_PPT},
+  {"application/zip", DOWNLOAD_CONTENT_ARCHIVE},
+  {"application/x-gzip", DOWNLOAD_CONTENT_ARCHIVE},
+  {"application/x-rar-compressed", DOWNLOAD_CONTENT_ARCHIVE},
+  {"application/x-tar", DOWNLOAD_CONTENT_ARCHIVE},
+  {"application/x-bzip", DOWNLOAD_CONTENT_ARCHIVE},
+  {"application/x-exe", DOWNLOAD_CONTENT_EXE},
+  {"application/x-apple-diskimage", DOWNLOAD_CONTENT_DMG},
+  {"application/x-chrome-extension", DOWNLOAD_CONTENT_CRX},
+};
+
+}  // namespace
+
+void RecordDownloadMimeType(const std::string& mime_type_string) {
+  DownloadContent download_content = DOWNLOAD_CONTENT_UNRECOGNIZED;
+
+  // Look up exact matches.
+  for (size_t i = 0; i < arraysize(kMapMimeTypeToDownloadContent); ++i) {
+    const MimeTypeToDownloadContent& entry =
+        kMapMimeTypeToDownloadContent[i];
+    if (mime_type_string == entry.mime_type) {
+      download_content = entry.download_content;
+      break;
+    }
+  }
+
+  // Do partial matches.
+  if (download_content == DOWNLOAD_CONTENT_UNRECOGNIZED) {
+    if (StartsWithASCII(mime_type_string, "text/", true)) {
+      download_content = DOWNLOAD_CONTENT_TEXT;
+    } else if (StartsWithASCII(mime_type_string, "image/", true)) {
+      download_content = DOWNLOAD_CONTENT_IMAGE;
+    } else if (StartsWithASCII(mime_type_string, "audio/", true)) {
+      download_content = DOWNLOAD_CONTENT_AUDIO;
+    } else if (StartsWithASCII(mime_type_string, "video/", true)) {
+      download_content = DOWNLOAD_CONTENT_VIDEO;
+    }
+  }
+
+  // Record the value.
+  UMA_HISTOGRAM_ENUMERATION("Download.ContentType",
+                            download_content,
+                            DOWNLOAD_CONTENT_MAX);
+}
+
 // Download progress painting --------------------------------------------------
 
 // Common bitmaps used for download progress animations. We load them once the
diff --git a/chrome/browser/download/download_util.h b/chrome/browser/download/download_util.h
index 644853f..d36762d4b0 100644
--- a/chrome/browser/download/download_util.h
+++ b/chrome/browser/download/download_util.h
@@ -174,6 +174,9 @@ void RecordDownloadCompleted(const base::TimeTicks& start);
 // Record INTERRUPTED_COUNT, |error|, |received| and |total| bytes.
 void RecordDownloadInterrupted(int error, int64 received, int64 total);
 
+// Records the mime type of the download.
+void RecordDownloadMimeType(const std::string& mime_type);
+
 // Paint the common download animation progress foreground and background,
 // clipping the foreground to 'percent' full. If percent is -1, then we don't
 // know the total size, so we just draw a rotating segment until we're done.
diff --git a/chrome/browser/renderer_host/download_resource_handler.cc b/chrome/browser/renderer_host/download_resource_handler.cc
index f35d5e4..289d150 100644
--- a/chrome/browser/renderer_host/download_resource_handler.cc
+++ b/chrome/browser/renderer_host/download_resource_handler.cc
@@ -95,6 +95,7 @@ bool DownloadResourceHandler::OnResponseStarted(int request_id,
                                                global_id_.request_id);
   info->content_disposition = content_disposition_;
   info->mime_type = response->response_head.mime_type;
+  download_util::RecordDownloadMimeType(info->mime_type);
   // TODO(ahendrickson) -- Get the last modified time and etag, so we can
   // resume downloading.