Retire some memcheck and Dr. Memory suppressions for CSS code

tools/valgrind/drmemory/suppressions_full.txt

Index: tools/valgrind/drmemory/suppressions_full.txt
diff --git a/tools/valgrind/drmemory/suppressions_full.txt b/tools/valgrind/drmemory/suppressions_full.txt
index 56a468ca5188e4533dab2b4518e710be339a007d..61ead3ac4fb283cd26766549bf087e6195bc0869 100644
--- a/tools/valgrind/drmemory/suppressions_full.txt
+++ b/tools/valgrind/drmemory/suppressions_full.txt
@@ -1496,19 +1496,6 @@ 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
@@ -1834,26 +1821,6 @@ 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
@@ -2097,17 +2064,6 @@ 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