Differential updates for components.

chrome/browser/component_updater/component_updater_service.h

Index: chrome/browser/component_updater/component_updater_service.h
diff --git a/chrome/browser/component_updater/component_updater_service.h b/chrome/browser/component_updater/component_updater_service.h
index 3ac645d8a0b0b4f7041aa6fb484680e0369878bd..8e8354620a3872e9c09e874a4e2f279c67243e5f 100644
--- a/chrome/browser/component_updater/component_updater_service.h
+++ b/chrome/browser/component_updater/component_updater_service.h
@@ -20,6 +20,8 @@ class DictionaryValue;
 class FilePath;
 }
 
+class ComponentPatcher;
+
 // Component specific installers must derive from this class and implement
 // OnUpdateError() and Install(). A valid instance of this class must be
 // given to ComponentUpdateService::RegisterComponent().
@@ -37,6 +39,13 @@ class ComponentInstaller {
   virtual bool Install(const base::DictionaryValue& manifest,
                        const base::FilePath& unpack_path) = 0;
 
+  // Set |installed_file| to the full path to the installed |file|. |file| is
+  // the filename of the file in this component's CRX. Returns false if this is
+  // not possible (the file has been removed or modified, or its current
+  // location is unknown). Otherwise, returns true.
+  virtual bool GetInstalledFile(const std::string& file,
+                                base::FilePath* installed_file) = 0;
+
  protected:
   virtual ~ComponentInstaller() {}
 };
@@ -55,12 +64,13 @@ struct CrxComponent {
   enum UrlSource {
     BANDAID,
     CWS_PUBLIC,
-    CWS_SANDBOX
+    CWS_SANDBOX,
   };
 
   std::vector<uint8> pk_hash;
   ComponentInstaller* installer;
   Version version;
+  std::string fingerprint;
   std::string name;
   UrlSource source;
   CrxComponent();
@@ -116,6 +126,8 @@ class ComponentUpdateService {
     virtual int OnDemandDelay() = 0;
     // The url that is going to be used update checks over Omaha protocol.
     virtual GURL UpdateUrl(CrxComponent::UrlSource source) = 0;
+    // The url where the completion pings are sent.
+    virtual GURL PingUrl() = 0;
     // Parameters added to each url request. It can be null if none are needed.
     virtual const char* ExtraRequestParams() = 0;
     // How big each update request can be. Don't go above 2000.
@@ -128,6 +140,13 @@ class ComponentUpdateService {
     // happens. It should be used mostly as a place to add application specific
     // logging or telemetry. |extra| is |event| dependent.
     virtual void OnEvent(Events event, int extra) = 0;
+    // Creates a new ComponentPatcher in a platform-specific way. This is useful
+    // for dependency injection.
+    virtual ComponentPatcher* CreateComponentPatcher() = 0;
+    // True means that this client can handle delta updates.
+    virtual bool DeltasEnabled() const = 0;
+    // True means this client is allowed to send component update status pings.
+    virtual bool PingsEnabled() const = 0;
   };
 
   // Start doing update checks and installing new versions of registered