Initial CL for Downloads resumption.

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..c731a47687250acd997eb85e238b922d4a1c2b72 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;
@@ -122,6 +123,9 @@ class CONTENT_EXPORT DownloadItem : public base::SupportsUserData {
   // Allow the user to temporarily pause a download or resume a paused download.
   virtual void TogglePause() = 0;
 
+  // Resume a download that's been interrupted.
+  virtual void ResumeInterruptedDownload() = 0;
+
   // Cancel the download operation. We need to distinguish between cancels at
   // exit (DownloadManager destructor) from user interface initiated cancels
   // because at exit, the history system may not exist, and any updates to it
@@ -157,6 +161,7 @@ class CONTENT_EXPORT DownloadItem : public base::SupportsUserData {
   virtual DownloadInterruptReason GetLastReason() const = 0;
 
   virtual bool IsPaused() const = 0;
+  virtual bool CanResumeInterrupted() const = 0;

[asanka, 2012/12/28 22:01:42]

Why is this in the public API?

[Randy Smith (Not in Mondays), 2012/12/29 17:16:16]

It was being used by the UI code in https://codereview.chromium.org/11673003/
and I forgot to remove it when I pulled that change out.  Removed, and I'll
update the other CL and let you decide if you want to add that change back in
when you do the UI changes.

   virtual bool IsTemporary() const = 0;
 
   //    Convenience routines for accessing GetState() results conceptually -----
@@ -277,6 +282,9 @@ 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;