Media Galleries API Picasa: Make PicasaDataProvider handle async PMP and INI parsing robustly.

chrome/browser/media_galleries/fileapi/safe_picasa_albums_indexer.cc

Index: chrome/browser/media_galleries/fileapi/safe_picasa_albums_indexer.cc
diff --git a/chrome/browser/media_galleries/fileapi/safe_picasa_albums_indexer.cc b/chrome/browser/media_galleries/fileapi/safe_picasa_albums_indexer.cc
index 5a55b53ebe0d35213a75512f17ce3ef602d6b106..a6bac89494d692efdd5bb0a175540acf31fd4302 100644
--- a/chrome/browser/media_galleries/fileapi/safe_picasa_albums_indexer.cc
+++ b/chrome/browser/media_galleries/fileapi/safe_picasa_albums_indexer.cc
@@ -9,7 +9,6 @@
 #include "chrome/common/chrome_utility_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/child_process_data.h"
-#include "content/public/browser/utility_process_host.h"
 
 using chrome::MediaFileSystemBackend;
 using content::BrowserThread;
@@ -105,11 +104,14 @@ void SafePicasaAlbumsIndexer::StartWorkOnIOThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK_EQ(FINISHED_READING_INI_FILES_STATE, parser_state_);
 
-  UtilityProcessHost* host =
-      UtilityProcessHost::Create(this, base::MessageLoopProxy::current());
-  host->EnableZygote();
-  host->Send(new ChromeUtilityMsg_IndexPicasaAlbumsContents(album_uids_,
-                                                            folders_inis_));
+  utility_process_host_ = content::UtilityProcessHost::Create(
+      this,
+      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO).get())
+      ->AsWeakPtr();
+
+  utility_process_host_->EnableZygote();
+  utility_process_host_->Send(new ChromeUtilityMsg_IndexPicasaAlbumsContents(
+      album_uids_, folders_inis_));
   parser_state_ = STARTED_PARSING_STATE;
 }
 
@@ -121,7 +123,9 @@ void SafePicasaAlbumsIndexer::OnIndexPicasaAlbumsContentsFinished(
 
   MediaFileSystemBackend::MediaTaskRunner()->PostTask(
       FROM_HERE,
-      base::Bind(callback_, albums_images));
+      base::Bind(callback_,
+                 make_scoped_refptr(this),
+                 albums_images));
   parser_state_ = FINISHED_PARSING_STATE;
 }