gdata: Add GDataCache::GetResourceIdsOfAllFiles()

chrome/browser/chromeos/gdata/gdata_cache.cc

Index: chrome/browser/chromeos/gdata/gdata_cache.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_cache.cc b/chrome/browser/chromeos/gdata/gdata_cache.cc
index 5c11ad95f6bbca6cfe46f627b4d3de540cbcd526..7558f7c0bcdbb1539d64d31b40e63c4d67c9d58e 100644
--- a/chrome/browser/chromeos/gdata/gdata_cache.cc
+++ b/chrome/browser/chromeos/gdata/gdata_cache.cc
@@ -228,6 +228,15 @@ void CollectExistingPinnedFile(std::vector<std::string>* resource_ids,
     resource_ids->push_back(resource_id);
 }
 
+// Appends |resource_id| ID to |resource_ids| unconditionally.
+void CollectAnyFile(std::vector<std::string>* resource_ids,
+                    const std::string& resource_id,
+                    const GDataCacheEntry& /* cache_entry */) {
+  DCHECK(resource_ids);
+
+  resource_ids->push_back(resource_id);
+}
+
 // Runs callback with pointers dereferenced.
 // Used to implement SetMountedStateOnUIThread.
 void RunSetMountedStateCallback(const SetMountedStateCallback& callback,
@@ -433,6 +442,21 @@ void GDataCache::GetResourceIdsOfExistingPinnedFilesOnUIThread(
                  base::Owned(resource_ids)));
 }
 
+void GDataCache::GetResourceIdsOfAllFilesOnUIThread(
+    const GetResourceIdsCallback& callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  std::vector<std::string>* resource_ids = new std::vector<std::string>;
+  blocking_task_runner_->PostTaskAndReply(
+      FROM_HERE,
+      base::Bind(&GDataCache::GetResourceIdsOfAllFiles,
+                 base::Unretained(this),
+                 resource_ids),
+      base::Bind(&RunGetResourceIdsCallback,
+                 callback,
+                 base::Owned(resource_ids)));
+}
+
 void GDataCache::FreeDiskSpaceIfNeededFor(int64 num_bytes,
                                           bool* has_enough_space) {
   AssertOnSequencedWorkerPool();
@@ -741,6 +765,14 @@ void GDataCache::GetResourceIdsOfExistingPinnedFiles(
   metadata_->Iterate(base::Bind(&CollectExistingPinnedFile, resource_ids));
 }
 
+void GDataCache::GetResourceIdsOfAllFiles(
+    std::vector<std::string>* resource_ids) {
+  AssertOnSequencedWorkerPool();
+  DCHECK(resource_ids);
+
+  metadata_->Iterate(base::Bind(&CollectAnyFile, resource_ids));
+}
+
 void GDataCache::GetFile(const std::string& resource_id,
                          const std::string& md5,
                          GDataFileError* error,