Download resumption - Preliminary

content/public/browser/download_item.h

Index: content/public/browser/download_item.h
diff --git a/content/public/browser/download_item.h b/content/public/browser/download_item.h
index 9eaf629612e7ca77f2f89701deba996ac6da7bd2..5c1a17449d5ae9518c726e3a6b012a67fcde5262 100644
--- a/content/public/browser/download_item.h
+++ b/content/public/browser/download_item.h
@@ -27,6 +27,7 @@
 #include "content/public/browser/download_danger_type.h"
 #include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/common/page_transition_types.h"
+#include "net/base/net_log.h"
 
 class FilePath;
 class GURL;
@@ -102,6 +103,10 @@ class CONTENT_EXPORT DownloadItem : public base::SupportsUserData {
     // down.
     virtual void OnDownloadDestroyed(DownloadItem* download) {}
 
+    // Support for download interruptions.
+    virtual void OnDownloadInterrupted(DownloadItem* download) {}
+    virtual void OnDownloadResumed(DownloadItem* download) {}
+
    protected:
     virtual ~Observer() {}
   };
@@ -157,6 +162,7 @@ class CONTENT_EXPORT DownloadItem : public base::SupportsUserData {
   virtual DownloadInterruptReason GetLastReason() const = 0;
 
   virtual bool IsPaused() const = 0;
+  virtual bool CanResumeInterrupted() const = 0;
   virtual bool IsTemporary() const = 0;
 
   //    Convenience routines for accessing GetState() results conceptually -----
@@ -277,6 +283,9 @@ class CONTENT_EXPORT DownloadItem : public base::SupportsUserData {
   // Returns true if it is OK to open the download.
   virtual bool CanOpenDownload() = 0;
 
+  // Returns true if the download is paused or interrupted, and can be resumed.
+  virtual bool CanResumeDownload() const = 0;
+
   // Tests if a file type should be opened automatically.
   virtual bool ShouldOpenFileBasedOnExtension() = 0;
 
@@ -319,6 +328,9 @@ class CONTENT_EXPORT DownloadItem : public base::SupportsUserData {
   virtual void SetDisplayName(const FilePath& name) = 0;
 
   // Debug/testing -------------------------------------------------------------
+  // Gets the BoundNetLog associated with this download.
+  virtual const net::BoundNetLog& GetBoundNetLog() const = 0;
+
   virtual std::string DebugString(bool verbose) const = 0;
   virtual void MockDownloadOpenForTesting() = 0;
 };