Remove ENABLE(FILE_SYSTEM) compile-time flag.

Source/WebCore/inspector/InspectorFrontendHost.cpp

Index: Source/WebCore/inspector/InspectorFrontendHost.cpp
diff --git a/Source/WebCore/inspector/InspectorFrontendHost.cpp b/Source/WebCore/inspector/InspectorFrontendHost.cpp
index 1f16d409f26e50c6269da7a0b50bb151cb8c2dba..7e84fa97c0afac06432571aaad5463c0dca02dbd 100644
--- a/Source/WebCore/inspector/InspectorFrontendHost.cpp
+++ b/Source/WebCore/inspector/InspectorFrontendHost.cpp
@@ -311,13 +311,11 @@ void InspectorFrontendHost::removeFileSystem(const String& fileSystemPath)
         m_client->removeFileSystem(fileSystemPath);
 }
 
-#if ENABLE(FILE_SYSTEM)
 PassRefPtr<DOMFileSystem> InspectorFrontendHost::isolatedFileSystem(const String& fileSystemName, const String& rootURL)
 {
     ScriptExecutionContext* context = m_frontendPage->mainFrame()->document();
     return DOMFileSystem::create(context, fileSystemName, FileSystemTypeIsolated, KURL(ParsedURLString, rootURL), AsyncFileSystem::create());
 }
-#endif
 
 bool InspectorFrontendHost::isUnderTest()
 {
@@ -340,4 +338,3 @@ String InspectorFrontendHost::hiddenPanels()
 }
 
 } // namespace WebCore
-