Implement initialization for GDataCache to use in-memory metadata for tests.

chrome/browser/chromeos/gdata/gdata_cache_metadata.cc

Index: chrome/browser/chromeos/gdata/gdata_cache_metadata.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_cache_metadata.cc b/chrome/browser/chromeos/gdata/gdata_cache_metadata.cc
index d10829eaa27c5cad968ddb126a692648178bf529..3df82696491d17c65776cd91d365bea5aaf0cddd 100644
--- a/chrome/browser/chromeos/gdata/gdata_cache_metadata.cc
+++ b/chrome/browser/chromeos/gdata/gdata_cache_metadata.cc
@@ -591,9 +591,12 @@ GDataCacheMetadata::~GDataCacheMetadata() {
 
 // static
 scoped_ptr<GDataCacheMetadata> GDataCacheMetadata::CreateGDataCacheMetadata(

[achuithb, 2012/08/06 23:22:20]

It may be better to write a separate function like
CreateGDataCacheMetadataForTesting instead of adding a boolean.

[satorux1, 2012/08/07 10:50:08]

agreed!

[Haruki Sato, 2012/08/08 05:00:42]

Done!

-    base::SequencedTaskRunner* blocking_task_runner) {
-  return scoped_ptr<GDataCacheMetadata>(
-      new GDataCacheMetadataDB(blocking_task_runner));
+    base::SequencedTaskRunner* blocking_task_runner, bool use_map) {
+  return use_map ?
+      scoped_ptr<GDataCacheMetadata>(
+          new GDataCacheMetadataMap(blocking_task_runner)) :
+      scoped_ptr<GDataCacheMetadata>(
+          new GDataCacheMetadataDB(blocking_task_runner));
 }
 
 void GDataCacheMetadata::AssertOnSequencedWorkerPool() {