Pack RenderLayer harder.
<https://webkit.org/b/126967>

Re-arrange the members of ScrollableArea a bit so that RenderLayer
can combine its bitfields with the ones in ScrollableArea.
This makes RenderLayer fit into a snugger size class, saving 32 bytes
per layer.

296 kB progression on Membuster3.

Reviewed by Antti Koivisto.

* platform/ScrollableArea.cpp:
* platform/ScrollableArea.h:

    Put bitfield members at the end of ScrollableArea so inheriting
    classes can synergize with the padding.

* rendering/RenderLayer.h:

    Make m_blendMode a bitfield to avoid bloating the class.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@161954 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Pack ResourceError harder.
<https://webkit.org/b/126969>

Re-arrange the members of ResourceError to reduce padding,
shrinking it by 8 bytes.

Reviewed by Antti Koivisto.

* platform/network/ResourceErrorBase.h:
(WebCore::ResourceErrorBase::ResourceErrorBase):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@161955 268f45cc-cd09-0410-ab3c-d52691b4dbfc
[GTK] Parse Valgrind xml leak files
https://bugs.webkit.org/show_bug.cgi?id=119446

Reviewed by Alejandro G. Castro.

Parse the xml files generated by Valgrind to yield useful
information about the memory leaks.

* Scripts/webkitpy/port/gtk.py:
(GtkPort.__init__):
(GtkPort.setup_test_run): Clear the previous output files before new
run.
(GtkPort.print_leaks_summary):

* Scripts/webkitpy/port/leakdetector_valgrind.py: Added.
Parse the xml files generated by Valgrind and summarise leaks
into an easily understandable list.
(get_text_of):
(get_CDATA_of):
(gather_frames):
(ValgrindError):
(ValgrindError.__init__):
(ValgrindError.__str__):
(ValgrindError.unique_string):
(ValgrindError.error_hash):
(ValgrindError.__hash__):
(ValgrindError.__eq__):
(LeakDetectorValgrind):
(LeakDetectorValgrind.__init__):
(LeakDetectorValgrind._parse_leaks_output):
(LeakDetectorValgrind.leaks_files_in_results_directory):
(LeakDetectorValgrind.clean_leaks_files_from_results_directory):
(LeakDetectorValgrind.parse_and_print_leaks_detail):

* Scripts/webkitpy/port/leakdetector_valgrind_unittest.py: Added.
(make_mock_valgrind_output):
(make_mock_incomplete_valgrind_output):
(make_mock_valgrind_results):
(make_mock_valgrind_results_incomplete):
(make_mock_valgrind_results_empty):
(make_mock_valgrind_results_misformatted):
(mock_run_cppfilt_command):
(LeakDetectorValgrindTest):
(LeakDetectorValgrindTest.test_parse_and_print_leaks_detail_pass):
(LeakDetectorValgrindTest.test_parse_and_print_leaks_detail_incomplete):
(LeakDetectorValgrindTest.test_parse_and_print_leaks_detail_empty):
(LeakDetectorValgrindTest.test_parse_and_print_leaks_detail_misformatted):
(LeakDetectorValgrindTest.test_parse_and_print_leaks_detail_pass):
(LeakDetectorValgrindTest.test_parse_and_print_leaks_detail_incomplete):
(LeakDetectorValgrindTest.test_parse_and_print_leaks_detail_empty):
(LeakDetectorValgrindTest.test_parse_and_print_leaks_detail_misformatted):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@161956 268f45cc-cd09-0410-ab3c-d52691b4dbfc