https://bugs.webkit.org/show_bug.cgi?id=38228

Reviewed by Darin Fisher.

WebCore:

* platform/chromium/ChromiumBridge.h:
* platform/chromium/FileSystemChromium.cpp:
(WebCore::openFile):
(WebCore::closeFile):
(WebCore::seekFile):
(WebCore::truncateFile):
(WebCore::readFromFile):
(WebCore::writeToFile):

WebKit/chromium:

* WebKit.gyp:
* public/WebFileSystem.h: Added.
* public/WebKitClient.h:
(WebKit::WebKitClient::fileSystem):
* src/ChromiumBridge.cpp:
(WebCore::ChromiumBridge::fileExists):
(WebCore::ChromiumBridge::deleteFile):
(WebCore::ChromiumBridge::deleteEmptyDirectory):
(WebCore::ChromiumBridge::getFileSize):
(WebCore::ChromiumBridge::getFileModificationTime):
(WebCore::ChromiumBridge::directoryName):
(WebCore::ChromiumBridge::pathByAppendingComponent):
(WebCore::ChromiumBridge::makeAllDirectories):
(WebCore::ChromiumBridge::getAbsolutePath):
(WebCore::ChromiumBridge::isDirectory):
(WebCore::ChromiumBridge::filePathToURL):
(WebCore::ChromiumBridge::openFile):
(WebCore::ChromiumBridge::closeFile):
(WebCore::ChromiumBridge::seekFile):
(WebCore::ChromiumBridge::truncateFile):
(WebCore::ChromiumBridge::readFromFile):
(WebCore::ChromiumBridge::writeToFile):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@58599 268f45cc-cd09-0410-ab3c-d52691b4dbfc