Merge 110332

Source/WebCore/rendering/RenderTextFragment.cpp

Index: Source/WebCore/rendering/RenderTextFragment.cpp
===================================================================
--- Source/WebCore/rendering/RenderTextFragment.cpp	(revision 110461)
+++ Source/WebCore/rendering/RenderTextFragment.cpp	(working copy)
@@ -33,6 +33,7 @@
     , m_start(startOffset)
     , m_end(length)
     , m_firstLetter(0)
+    , m_allowFragmentReset(true)
 {
 }
 
@@ -42,6 +43,7 @@
     , m_end(str ? str->length() : 0)
     , m_contentString(str)
     , m_firstLetter(0)
+    , m_allowFragmentReset(true)
 {
 }
 
@@ -60,7 +62,9 @@
 
 void RenderTextFragment::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
 {
+    m_allowFragmentReset = false;
     RenderText::styleDidChange(diff, oldStyle);
+    m_allowFragmentReset = true;
 
     if (RenderBlock* block = blockForAccompanyingFirstLetter()) {
         block->style()->removeCachedPseudoStyle(FIRST_LETTER);
@@ -78,15 +82,18 @@
 void RenderTextFragment::setTextInternal(PassRefPtr<StringImpl> text)
 {
     RenderText::setTextInternal(text);
-    if (m_firstLetter) {
-        ASSERT(!m_contentString);
-        m_firstLetter->destroy();
-        m_firstLetter = 0;
+
+    if (m_allowFragmentReset) {
         m_start = 0;
         m_end = textLength();
-        if (Node* t = node()) {
-            ASSERT(!t->renderer());
-            t->setRenderer(this);
+        if (m_firstLetter) {
+            ASSERT(!m_contentString);
+            m_firstLetter->destroy();
+            m_firstLetter = 0;
+            if (Node* t = node()) {
+                ASSERT(!t->renderer());
+                t->setRenderer(this);
+            }
         }
     }
 }