Differential updates for components.

chrome/common/extensions/update_manifest.h

Index: chrome/common/extensions/update_manifest.h
diff --git a/chrome/common/extensions/update_manifest.h b/chrome/common/extensions/update_manifest.h
index d84774360fd83e26ffa1ff456299ddd6a715e198..0205b8d11cc12bfd3d4ab0769f8c0f5b4968dee1 100644
--- a/chrome/common/extensions/update_manifest.h
+++ b/chrome/common/extensions/update_manifest.h
@@ -15,13 +15,15 @@ class UpdateManifest {
 
   // An update manifest looks like this:
   //
-  // <?xml version='1.0' encoding='UTF-8'?>
-  // <gupdate xmlns='http://www.google.com/update2/response' protocol='2.0'>
-  //  <daystart elapsed_seconds='300' />
-  //  <app appid='12345'>
-  //   <updatecheck codebase='http://example.com/extension_1.2.3.4.crx'
-  //                version='1.2.3.4' prodversionmin='2.0.143.0'
-  //                hash="12345"/>
+  // <?xml version="1.0" encoding="UTF-8"?>
+  // <gupdate xmlns="http://www.google.com/update2/response" protocol="2.0">
+  //  <daystart elapsed_seconds="300" />
+  //  <app appid="12345" status="ok">
+  //   <updatecheck codebase="http://example.com/extension_1.2.3.4.crx"
+  //                hash="12345" size="9854" status="ok" version="1.2.3.4"
+  //                prodversionmin="2.0.143.0"
+  //                codebasediff="http://example.com/diff_1.2.3.4.crx"
+  //                hashdiff="123" sizediff="101" />
   //  </app>
   // </gupdate>
   //
@@ -33,6 +35,9 @@ class UpdateManifest {
   // fetch the updated crx file, and the "prodversionmin" attribute refers to
   // the minimum version of the chrome browser that the update applies to.
 
+  // The diff data members correspond to the differential update package, if
+  // a differential update is specified in the response.
+
   // The result of parsing one <app> tag in an xml update check manifest.
   struct Result {
     Result();
@@ -41,8 +46,17 @@ class UpdateManifest {
     std::string extension_id;
     std::string version;
     std::string browser_min_version;
-    std::string package_hash;
+
+    // Attributes for the full update.
     GURL crx_url;
+    std::string package_hash;
+    int size;
+    std::string package_fingerprint;
+
+    // Attributes for the differential update.
+    GURL diff_crx_url;
+    std::string diff_package_hash;
+    int diff_size;
   };
 
   static const int kNoDaystart = -1;