Add a WebDocument::watchCssSelectors(selectors)

Source/core/rendering/style/RenderStyle.cpp

Index: Source/core/rendering/style/RenderStyle.cpp
diff --git a/Source/core/rendering/style/RenderStyle.cpp b/Source/core/rendering/style/RenderStyle.cpp
index 1ffb016b2fbd11bc963a16c1ebf6540dbc66ac96..bc0bd8fcea443aa5c358975fde13085b0ebf312b 100644
--- a/Source/core/rendering/style/RenderStyle.cpp
+++ b/Source/core/rendering/style/RenderStyle.cpp
@@ -26,6 +26,7 @@
 #include <algorithm>
 #include "CSSPropertyNames.h"
 #include "core/css/resolver/StyleResolver.h"
+#include "core/dom/CSSSelectorWatch.h"
 #include "core/dom/WebCoreMemoryInstrumentation.h"
 #include "core/platform/graphics/Font.h"
 #include "core/platform/graphics/FontSelector.h"
@@ -692,6 +693,28 @@ void RenderStyle::clearCursorList()
         rareInheritedData.access()->cursorData = 0;
 }
 
+void RenderStyle::addCallbackSelector(const String& selector, CSSSelectorWatch* selectorWatch)
+{
+    ASSERT(!rareNonInheritedData->m_selectorWatch.get()
+        || rareNonInheritedData->m_selectorWatch.get() == selectorWatch);
+    if (!rareNonInheritedData->m_callbackSelectors.contains(selector)) {
+        StyleRareNonInheritedData* data = rareNonInheritedData.access();
+        data->m_callbackSelectors.append(selector);
+        // Assigns a WeakPtr to |selectorWatch| to data->m_selectorWatch.
+        selectorWatch->addSelectorMatch(selector, data);
+    }
+}
+
+void RenderStyle::removeCallbackSelector(const String& selector)

[esprehn, 2013/07/17 07:14:32]

Nothing ever calls this, can you just remove it?

[Jeffrey Yasskin, 2013/08/02 01:34:07]

Done.

+{
+    size_t index = rareNonInheritedData->m_callbackSelectors.find(selector);
+    if (index != notFound) {
+        rareNonInheritedData.access()->m_callbackSelectors.remove(index);
+        if (CSSSelectorWatch* selectorWatch = rareNonInheritedData->m_selectorWatch.get())
+            selectorWatch->removeSelectorMatch(selector);
+    }
+}
+
 void RenderStyle::clearContent()
 {
     if (rareNonInheritedData->m_content)