[Downloads] Introduce GUIDs for downloads.

components/history/core/browser/download_row.cc

Index: components/history/core/browser/download_row.cc
diff --git a/components/history/core/browser/download_row.cc b/components/history/core/browser/download_row.cc
index 1c97d60277777c62311276a1aebbcd3792331e7c..80055f65b147c1fdad29e6d24d85618fb6024519 100644
--- a/components/history/core/browser/download_row.cc
+++ b/components/history/core/browser/download_row.cc
@@ -13,6 +13,7 @@ DownloadRow::DownloadRow()
       total_bytes(0),
       state(DownloadState::IN_PROGRESS),
       danger_type(DownloadDangerType::NOT_DANGEROUS),
+      interrupt_reason(0),
       id(kInvalidDownloadId),
       opened(false) {
   // |interrupt_reason| is left undefined by this constructor as the value
@@ -23,6 +24,7 @@ DownloadRow::DownloadRow(const base::FilePath& current_path,
                          const base::FilePath& target_path,
                          const std::vector<GURL>& url_chain,
                          const GURL& referrer,
+                         const std::string& http_method,
                          const std::string& mime_type,
                          const std::string& original_mime_type,
                          const base::Time& start,
@@ -34,7 +36,9 @@ DownloadRow::DownloadRow(const base::FilePath& current_path,
                          DownloadState download_state,
                          DownloadDangerType danger_type,
                          DownloadInterruptReason interrupt_reason,
+                         const std::string& hash,
                          DownloadId id,
+                         const std::string& guid,
                          bool download_opened,
                          const std::string& ext_id,
                          const std::string& ext_name)
@@ -42,6 +46,7 @@ DownloadRow::DownloadRow(const base::FilePath& current_path,
       target_path(target_path),
       url_chain(url_chain),
       referrer_url(referrer),
+      http_method(http_method),
       mime_type(mime_type),
       original_mime_type(original_mime_type),
       start_time(start),
@@ -53,14 +58,40 @@ DownloadRow::DownloadRow(const base::FilePath& current_path,
       state(download_state),
       danger_type(danger_type),
       interrupt_reason(interrupt_reason),
+      hash(hash),
       id(id),
+      guid(guid),
       opened(download_opened),
       by_ext_id(ext_id),
       by_ext_name(ext_name) {}
 
 DownloadRow::DownloadRow(const DownloadRow& other) = default;
 
-DownloadRow::~DownloadRow() {
+DownloadRow::~DownloadRow() {}
+
+bool DownloadRow::operator==(const DownloadRow& rhs) const {
+  return current_path == rhs.current_path &&
+         target_path == rhs.target_path &&
+         url_chain == rhs.url_chain &&
+         referrer_url == rhs.referrer_url &&
+         http_method == rhs.http_method &&
+         mime_type == rhs.mime_type &&
+         original_mime_type == rhs.original_mime_type &&
+         start_time == rhs.start_time &&
+         end_time == rhs.end_time &&
+         etag == rhs.etag &&
+         last_modified == rhs.last_modified &&
+         received_bytes == rhs.received_bytes &&
+         total_bytes == rhs.total_bytes &&
+         state == rhs.state &&
+         danger_type == rhs.danger_type &&
+         interrupt_reason == rhs.interrupt_reason &&
+         hash == rhs.hash &&
+         id == rhs.id &&
+         guid == rhs.guid &&
+         opened == rhs.opened &&
+         by_ext_id == rhs.by_ext_id &&
+         by_ext_name == rhs.by_ext_name;
 }
 
 }  // namespace history