[fsp] Add a method to enumerate all mounted file systems.

chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc

Index: chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc
diff --git a/chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc b/chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc
index f8753a9724a77df1a84d17b90206e3c4ca01f69f..e8fafd7a408e200fda0571cb05feca3f1e2da6da 100644
--- a/chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc
+++ b/chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc
@@ -5,8 +5,10 @@
 #include "chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.h"
 
 #include <string>
+#include <vector>
 
 #include "base/debug/trace_event.h"
+#include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_interface.h"
@@ -16,6 +18,7 @@
 #include "chrome/common/extensions/api/file_system_provider.h"
 #include "chrome/common/extensions/api/file_system_provider_internal.h"
 
+using chromeos::file_system_provider::ProvidedFileSystemInfo;
 using chromeos::file_system_provider::ProvidedFileSystemInterface;
 using chromeos::file_system_provider::RequestValue;
 using chromeos::file_system_provider::Service;
@@ -29,7 +32,7 @@ bool FileSystemProviderMountFunction::RunSync() {
 
   // It's an error if the file system Id is empty.
   if (params->options.file_system_id.empty()) {
-    base::ListValue* result = new base::ListValue();
+    base::ListValue* const result = new base::ListValue();
     result->Append(CreateError(kSecurityErrorName, kEmptyIdErrorMessage));
     SetResult(result);
     return true;
@@ -37,14 +40,14 @@ bool FileSystemProviderMountFunction::RunSync() {
 
   // It's an error if the display name is empty.
   if (params->options.display_name.empty()) {
-    base::ListValue* result = new base::ListValue();
+    base::ListValue* const result = new base::ListValue();
     result->Append(CreateError(kSecurityErrorName,
                                kEmptyNameErrorMessage));
     SetResult(result);
     return true;
   }
 
-  Service* service = Service::Get(GetProfile());
+  Service* const service = Service::Get(GetProfile());
   DCHECK(service);
   if (!service)
     return false;
@@ -54,7 +57,7 @@ bool FileSystemProviderMountFunction::RunSync() {
                                 params->options.file_system_id,
                                 params->options.display_name,
                                 params->options.writable)) {
-    base::ListValue* result = new base::ListValue();
+    base::ListValue* const result = new base::ListValue();
     result->Append(CreateError(kSecurityErrorName, kMountFailedErrorMessage));
     SetResult(result);
     return true;
@@ -70,7 +73,7 @@ bool FileSystemProviderUnmountFunction::RunSync() {
   scoped_ptr<Params> params(Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params);
 
-  Service* service = Service::Get(GetProfile());
+  Service* const service = Service::Get(GetProfile());
   DCHECK(service);
   if (!service)
     return false;
@@ -85,11 +88,34 @@ bool FileSystemProviderUnmountFunction::RunSync() {
     return true;
   }
 
-  base::ListValue* result = new base::ListValue();
+  base::ListValue* const result = new base::ListValue();
   SetResult(result);
   return true;
 }
 
+bool FileSystemProviderGetAllFunction::RunSync() {
+  using api::file_system_provider::FileSystemInfo;
+  Service* const service = Service::Get(GetProfile());
+  DCHECK(service);
+  if (!service)
+    return false;
+
+  const std::vector<ProvidedFileSystemInfo> file_systems =
+      service->GetProvidedFileSystemInfoList();
+  std::vector<linked_ptr<FileSystemInfo> > items;
+
+  for (size_t i = 0; i < file_systems.size(); ++i) {
+    linked_ptr<FileSystemInfo> item(new FileSystemInfo);
+    item->file_system_id = file_systems[i].file_system_id();
+    item->display_name = file_systems[i].display_name();
+    item->writable = file_systems[i].writable();
+    items.push_back(item);
+  }
+
+  SetResultList(api::file_system_provider::GetAll::Results::Create(items));
+  return true;
+}
+
 bool FileSystemProviderInternalUnmountRequestedSuccessFunction::RunWhenValid() {
   using api::file_system_provider_internal::UnmountRequestedSuccess::Params;
   scoped_ptr<Params> params(Params::Create(*args_));