Fix filesystem API file_handlers to work for drive on ChromeOS.

webkit/fileapi/file_system_context.cc

Index: webkit/fileapi/file_system_context.cc
diff --git a/webkit/fileapi/file_system_context.cc b/webkit/fileapi/file_system_context.cc
index 017cf29f417ed78b3a73a84a6a864fdbf0f909b5..e19d5da4fff27df94f582d95d7b743c9b166bf62 100644
--- a/webkit/fileapi/file_system_context.cc
+++ b/webkit/fileapi/file_system_context.cc
@@ -141,6 +141,7 @@ FileSystemMountPointProvider* FileSystemContext::GetMountPointProvider(
     case kFileSystemTypeSyncable:
       return sandbox_provider_.get();
     case kFileSystemTypeExternal:
+    case kFileSystemTypeExternalFullPath:
     case kFileSystemTypeDrive:
     case kFileSystemTypeRestrictedNativeLocal:
       return external_provider_.get();
@@ -351,17 +352,22 @@ FileSystemURL FileSystemContext::CrackFileSystemURL(
   // This is valid situation for non isolated/external file systems.
   FileSystemURL result = url;
 
-  for (size_t i = 0; i < url_crackers_.size(); ++i) {
-    if (!url_crackers_[i]->HandlesFileSystemMountType(url.type()))
-      continue;
-
-    result = url_crackers_[i]->CreateCrackedFileSystemURL(url.origin(),
-                                                          url.type(),
-                                                          url.path());
-    if (result.is_valid())
-      return result;
+  bool cracked = true;
+  while (cracked) {
+    LOG(ERROR) << "CRACKING: " << result.type() << " " << result.path().value();
+    cracked = false;
+    for (size_t i = 0; i < url_crackers_.size(); ++i) {
+      if (!url_crackers_[i]->HandlesFileSystemMountType(result.type()))
+        continue;
+
+      result = url_crackers_[i]->CrackFileSystemURL(result);
+      if (result.is_valid()) {
+        cracked = true;
+        break;
+      }
+    }
   }
-
+  LOG(ERROR) << "RESULT: " << result.type() << " " << result.path().value();
   return result;
 }