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Reviewed by mjs.
Fix tokenizer crash when document.open() is called from an external script:
<rdar://problem/4483882> REGRESSION (417.8-TOT): crash at yourmovies.com.au in WebCore::HTMLTokenizer::reset() + 92 (7818)
* dom/Document.cpp:
(WebCore::Document::open): Check to make sure the current tokenizer isn't executing a script
* dom/xml_tokenizer.h:
(WebCore::Tokenizer::executingScript): Add a way for others to know if scripts are executing.
* html/HTMLTokenizer.cpp:
(WebCore::HTMLTokenizer::scriptExecution): Wire into existing m_executingScript member var.
* html/HTMLTokenizer.h:
(WebCore::HTMLTokenizer::executingScript):
* kcanvas/device/quartz/KCanvasFilterQuartz.mm:
(WebCore::KCanvasFilterQuartz::prepareFilter): Unrelated code cleanup.
git-svn-id: svn://svn.chromium.org/blink/trunk@13413 bbb929c8-8fbe-4397-9dbb-9b2b20218538
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