Implement the ability to obliterate a storage partition from disk.

content/browser/browser_context.cc

Index: content/browser/browser_context.cc
diff --git a/content/browser/browser_context.cc b/content/browser/browser_context.cc
index d8bc87e317698c9ec9f9b898e224bff9ccafc207..94cf92b4748ad0a736f4a56986fd79aeea24d2b4 100644
--- a/content/browser/browser_context.cc
+++ b/content/browser/browser_context.cc
@@ -37,11 +37,8 @@ namespace {
 const char* kDownloadManagerKeyName = "download_manager";
 const char* kStorageParitionMapKeyName = "content_storage_partition_map";
 
-StoragePartition* GetStoragePartitionFromConfig(
-    BrowserContext* browser_context,
-    const std::string& partition_domain,
-    const std::string& partition_name,
-    bool in_memory) {
+StoragePartitionImplMap* GetStoragePartitionMap(
+    BrowserContext* browser_context) {
   StoragePartitionImplMap* partition_map =
       static_cast<StoragePartitionImplMap*>(
           browser_context->GetUserData(kStorageParitionMapKeyName));
@@ -49,6 +46,16 @@ StoragePartition* GetStoragePartitionFromConfig(
     partition_map = new StoragePartitionImplMap(browser_context);
     browser_context->SetUserData(kStorageParitionMapKeyName, partition_map);
   }
+  return partition_map;
+}
+
+StoragePartition* GetStoragePartitionFromConfig(
+    BrowserContext* browser_context,
+    const std::string& partition_domain,
+    const std::string& partition_name,
+    bool in_memory) {
+  StoragePartitionImplMap* partition_map =
+      GetStoragePartitionMap(browser_context);
 
   if (browser_context->IsOffTheRecord())
     in_memory = true;
@@ -84,6 +91,13 @@ void PurgeMemoryOnIOThread(appcache::AppCacheService* appcache_service) {
 
 }  // namespace
 
+// static
+void BrowserContext::AsyncObliterateStoragePartition(
+    BrowserContext* browser_context,
+    const GURL& site) {
+  GetStoragePartitionMap(browser_context)->AsyncObliterate(site);
+}
+
 DownloadManager* BrowserContext::GetDownloadManager(
     BrowserContext* context) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));