Changeset 83873

Add webkit prefix to Blob.slice method and change its semantics to be
like Array.slice
​https://bugs.webkit.org/show_bug.cgi?id=58496

Reviewed by Darin Fisher.

Source/WebCore:

Renamed Blob.slice to blob.webkitSlice and made it take start and end
parameters that're like Array.slice.

Test: fast/files/blob-slice-test.html

• fileapi/Blob.cpp:

(WebCore::Blob::webkitSlice):

• fileapi/Blob.h:
• fileapi/Blob.idl:

LayoutTests:

Added a new test to test the new behavior and also update all existing
tests to use the new name.

• fast/dom/Window/window-properties.html:
• fast/files/blob-slice-overflow.html:
• fast/files/blob-slice-test-expected.txt: Added.
• fast/files/blob-slice-test.html: Added.
• fast/files/resources/read-blob-test-cases.js:

(testReadingSlicedFileBlob):
(testReadingSlicedTextBlob):
(testReadingSlicedArrayBufferBlob):
(testReadingSlicedHybridBlob):
(testReadingTripleSlicedHybridBlob):

• fast/filesystem/resources/file-writer-utils.js:

(verifyByteRangeIsZeroesHelper):
(verifyByteRangeAsStringHelper):

• http/tests/local/blob/script-tests/send-hybrid-blob.js:

():

• http/tests/local/blob/script-tests/send-sliced-data-blob.js:

(runSliceTest):

• http/tests/local/fileapi/script-tests/send-sliced-dragged-file.js:

(onStableFileDrop):
(onUnstableFileDrop):

• http/tests/local/formdata/resources/send-form-data-common.js:

(testSendingFormData):