Remove iOS specific disk image cache

Remove iOS specific disk image cache
https://bugs.webkit.org/show_bug.cgi?id=136517

Reviewed by Antti Koivisto.

Disk image cache code unnecessarily complicates SharedBuffer implementation. We can remove
this now since we don't enable it in WebKit2 on iOS.

Source/WebCore:

* WebCore.exp.in:
* WebCore.xcodeproj/project.pbxproj:
* loader/ResourceBuffer.cpp:
(WebCore::ResourceBuffer::isUsingDiskImageCache): Deleted.
* loader/ResourceBuffer.h:
* loader/cache/CachedImage.cpp:
(WebCore::CachedImage::canUseDiskImageCache): Deleted.
(WebCore::CachedImage::useDiskImageCache): Deleted.
* loader/cache/CachedImage.h:
* loader/cache/CachedResource.cpp:
(WebCore::CachedResource::isUsingDiskImageCache): Deleted.
* loader/cache/CachedResource.h:
(WebCore::CachedResource::canUseDiskImageCache): Deleted.
(WebCore::CachedResource::useDiskImageCache): Deleted.
* loader/cache/MemoryCache.cpp:
(WebCore::MemoryCache::TypeStatistic::addResource):
(WebCore::MemoryCache::dumpStats):
(WebCore::MemoryCache::dumpLRULists):
(WebCore::MemoryCache::flushCachedImagesToDisk): Deleted.
* loader/cache/MemoryCache.h:
(WebCore::MemoryCache::TypeStatistic::TypeStatistic):
* loader/ios/DiskImageCacheClientIOS.h: Removed.
* loader/ios/DiskImageCacheIOS.h: Removed.
* loader/ios/DiskImageCacheIOS.mm: Removed.
* platform/Logging.h:
* platform/SharedBuffer.cpp:
(WebCore::SharedBuffer::SharedBuffer):
(WebCore::SharedBuffer::~SharedBuffer):
(WebCore::SharedBuffer::data):
(WebCore::SharedBuffer::append):
(WebCore::SharedBuffer::buffer):
(WebCore::SharedBuffer::getSomeData):
(WebCore::SharedBuffer::isAllowedToBeMemoryMapped): Deleted.
(WebCore::SharedBuffer::allowToBeMemoryMapped): Deleted.
(WebCore::SharedBuffer::failedMemoryMap): Deleted.
(WebCore::SharedBuffer::markAsMemoryMapped): Deleted.
(WebCore::SharedBuffer::memoryMappedNotificationCallbackData): Deleted.
(WebCore::SharedBuffer::memoryMappedNotificationCallback): Deleted.
(WebCore::SharedBuffer::setMemoryMappedNotificationCallback): Deleted.
* platform/SharedBuffer.h:
(WebCore::SharedBuffer::isMemoryMapped): Deleted.
* platform/cf/SharedBufferCF.cpp:
(WebCore::SharedBuffer::SharedBuffer):
* platform/mac/SharedBufferMac.mm:
(-[WebCoreSharedBufferData length]):
(-[WebCoreSharedBufferData bytes]):
(WebCore::SharedBuffer::createCFData):
(-[WebCoreSharedBufferData initWithMemoryMappedSharedBuffer:]): Deleted.

Source/WebKit:

* WebKit.xcodeproj/project.pbxproj:

Source/WebKit/ios:

* WebCoreSupport/WebDiskImageCacheClientIOS.h: Removed.
* WebCoreSupport/WebDiskImageCacheClientIOS.mm: Removed.
* WebView/WebPDFViewPlaceholder.mm:
(-[WebPDFViewPlaceholder finishedLoadingWithDataSource:]):
(-[WebPDFViewPlaceholder dataSourceMemoryMapped]): Deleted.
(-[WebPDFViewPlaceholder dataSourceMemoryMapFailed]): Deleted.

Source/WebKit/mac:

* Misc/WebCache.mm:
(+[WebCache statistics]):
* WebView/WebDataSource.mm:
(-[WebDataSource _setAllowToBeMemoryMapped]):
(-[WebDataSource setDataSourceDelegate:]):
(-[WebDataSource dataSourceDelegate]):
(-[WebDataSource dealloc]):
(BufferMemoryMapped): Deleted.
* WebView/WebPreferenceKeysPrivate.h:
* WebView/WebPreferences.mm:
(+[WebPreferences initialize]):
(-[WebPreferences diskImageCacheEnabled]): Deleted.
(-[WebPreferences setDiskImageCacheEnabled:]): Deleted.
(-[WebPreferences diskImageCacheMinimumImageSize]): Deleted.
(-[WebPreferences setDiskImageCacheMinimumImageSize:]): Deleted.
(-[WebPreferences diskImageCacheMaximumCacheSize]): Deleted.
(-[WebPreferences setDiskImageCacheMaximumCacheSize:]): Deleted.
(-[WebPreferences _diskImageCacheSavedCacheDirectory]): Deleted.
(-[WebPreferences _setDiskImageCacheSavedCacheDirectory:]): Deleted.
* WebView/WebPreferencesPrivate.h:
* WebView/WebView.mm:
(-[WebView _commonInitializationWithFrameName:groupName:]):
(+[WebView _handleMemoryWarning]):
(-[WebView _preferencesChanged:]):

Source/WTF:

* wtf/FeatureDefines.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@173265 268f45cc-cd09-0410-ab3c-d52691b4dbfc