Retire some memcheck and Dr. Memory suppressions for CSS code

tools/valgrind/drmemory/suppressions_full.txt

 # This file contains suppressions for the Dr.Memory tool, see
 # http://dev.chromium.org/developers/how-tos/using-drmemory
 #
 # This file should contain suppressions only for the reports happening
 # in the 'full' mode (drmemory_full).
 # For the reports that can happen in the light mode (a.k.a. drmemory_light),
 # please use suppressions.txt instead.
 
 ###############################################################
 # Known reports on the third party we have no control over.
@@ skipping 1478 matching lines @@
 
 UNINITIALIZED READ
 name=bug_340752
 ...
 *!*::ThreadState::visitStack
 
 UNINITIALIZED READ
 name=bug_343663
 blink_web.dll!blink::RenderBlock::computeInlinePreferredLogicalWidths
 
-UNINITIALIZED READ
-name=bug_343797
-...
-blink_web.dll!blink::MediaQueryExp::create
-blink_web.dll!blink::BisonCSSParser::createFloatingMediaQueryExp
-blink_web.dll!cssyyparse
-
-UNINITIALIZED READ
-name=bug_343915
-blink_web.dll!blink::BisonCSSParser::parseFlex
-blink_web.dll!blink::BisonCSSParser::parseValue
-blink_web.dll!cssyyparse
-
 UNADDRESSABLE ACCESS
 name=BUG_343958
 blink_web.dll!blink::Node::getFlag
 blink_web.dll!blink::Node::inDocument
 blink_web.dll!blink::Node::isDescendantOf
 blink_web.dll!blink::CompositeEditCommand::cloneParagraphUnderNewElement
 blink_web.dll!blink::CompositeEditCommand::moveParagraphWithClones
 
 UNINITIALIZED READ
 name=BUG_344076
@@ skipping 305 matching lines @@
 system call NtUserCreateWindowEx
 USER32.dll!UnregisterClassW
 USER32.dll!UnregisterClassW
 USER32.dll!CreateWindowExW
 gfx.dll!gfx::WindowImpl::Init
 win_window.dll!ui::WinWindow::WinWindow
 aura.dll!aura::WindowTreeHostPlatform::WindowTreeHostPlatform
 aura.dll!aura::WindowTreeHost::Create
 
 UNINITIALIZED READ
-name=bug_492821
-*!blink::CSSPropertyParser::validUnit
-...
-*!blink::CSSPropertyParser::parseValue
-*!blink::CSSPropertyParser::parseValue
-*!blink::CSSParserImpl::consumeDeclarationValue
-*!blink::CSSParserImpl::consumeDeclaration
-*!blink::CSSParserImpl::consumeDeclarationList
-*!blink::CSSParserImpl::consumeStyleRule
-*!blink::CSSParserImpl::consumeQualifiedRule
-*!blink::CSSParserImpl::consumeRuleList<>
-*!blink::CSSParserImpl::parseStyleSheet
-*!blink::CSSParser::parseSheet
-*!blink::StyleSheetContents::parseStringAtPosition
-*!blink::StyleEngine::parseSheet
-*!blink::StyleEngine::createSheet
-*!blink::StyleElement::createSheet
-*!blink::StyleElement::process
-
-UNINITIALIZED READ
 name=bug_493167
 system call NtWriteFile parameter #5
 KERNELBASE.dll!WriteFile
 KERNEL32.dll!WriteFile
 *!base::File::WriteAtCurrentPos
 *!sessions::SessionBackend::AppendCommandsToFile
 *!sessions::SessionBackend::AppendCommands
 
 UNADDRESSABLE ACCESS
 name=bug_505734
@@ skipping 223 matching lines @@
 base.dll!base::SharedMemory::Create
 content.dll!content::ChildThreadImpl::AllocateSharedMemory
 content.dll!content::RenderThreadImpl::HostAllocateSharedMemoryBuffer
 content.dll!content::ImageDataPlatformBackend::Init
 content.dll!content::PPB_ImageData_Impl::Init
 content.dll!content::PepperGraphics2DHost::Init
 content.dll!content::PepperGraphics2DHost::Create
 content.dll!content::ContentRendererPepperHostFactory::CreateResourceHost
 
 UNINITIALIZED READ
-name=bug_591092
-webcore_shared.dll!std::_Equal<>
-webcore_shared.dll!WTF::operator==<>
-webcore_shared.dll!blink::CSSVariableData::operator==
-webcore_shared.dll!blink::dataEquivalent<>
-webcore_shared.dll!blink::dataEquivalent<>
-...
-webcore_shared.dll!blink::Document::updateStyle
-webcore_shared.dll!blink::Document::updateLayoutTree
-
-UNINITIALIZED READ
 name=bug_593594
 blink_platform.dll!qcms_transform_data_rgba_out_lut_sse2
 blink_platform.dll!qcms_transform_data_type
 blink_platform.dll!blink::JPEGImageDecoder::outputScanlines
 blink_platform.dll!blink::JPEGImageReader::decode
 
 UNINITIALIZED READ
 name=bug_594657
 *!std::_Tree<>::_Eqrange<>
 *!courgette::adjustment_method_2::AssignmentProblem::Declassify
@@ skipping 82 matching lines @@
 
 HANDLE LEAK
 name=bug_598364
 system call NtGdiCreateDIBSection
 GDI32.dll!CreateDIBSection
 skia.dll!`anonymous namespace'::CreateHBitmap
 skia.dll!skia::BitmapPlatformDevice::Create
 ...
 webcore_shared.dll!blink::ScriptController::createPluginWrapper
 webcore_shared.dll!blink::HTMLPlugInElement::pluginWrapper