Not build StorageArea.cpp in webkit.gyp

TBR=jorlow

Review URL: http://codereview.chromium.org/149375

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@20221 0039d316-1c4b-4281-b951-d872f2087c98

webkit/webkit.gyp

@@ -3407,7 +3407,6 @@
         '../third_party/WebKit/WebCore/storage/SessionStorageArea.h',
         '../third_party/WebKit/WebCore/storage/Storage.cpp',
         '../third_party/WebKit/WebCore/storage/Storage.h',
-        '../third_party/WebKit/WebCore/storage/StorageArea.cpp',
         '../third_party/WebKit/WebCore/storage/StorageArea.h',
         '../third_party/WebKit/WebCore/storage/StorageEvent.cpp',
         '../third_party/WebKit/WebCore/storage/StorageEvent.h',