Collapse fileapi, webkit_blob, webkit_database, quota, and webkit_common namespaces into single storage namespace

As discussed here:
https://groups.google.com/a/chromium.org/forum/#!topic/storage-dev/aQall8GOrS4

BUG=338338
TBR=cevans
NOTRY=true

Review URL: https://codereview.chromium.org/492873002

Cr-Commit-Position: refs/heads/master@{#291485}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@291485 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 895b5321..3ec1c33 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -1096,9 +1096,9 @@
   // storage partition may get destroyed only after the extension gets unloaded.
   GURL site =
       extensions::util::GetSiteForExtensionId(extension->id(), profile_);
-  fileapi::FileSystemContext* filesystem_context =
-      BrowserContext::GetStoragePartitionForSite(profile_, site)->
-          GetFileSystemContext();
+  storage::FileSystemContext* filesystem_context =
+      BrowserContext::GetStoragePartitionForSite(profile_, site)
+          ->GetFileSystemContext();
   if (filesystem_context && filesystem_context->external_backend()) {
     filesystem_context->external_backend()->
         RevokeAccessForExtension(extension->id());