Make TextIterator not stop at IMG element for finding text separating inline image

Source/core/editing/TextIterator.h

Index: Source/core/editing/TextIterator.h
diff --git a/Source/core/editing/TextIterator.h b/Source/core/editing/TextIterator.h
index cbe398e7ffbd571bdb8c98b7a93d73fa447ff74a..f3b82a19076aa33fffd79d15e4f281456cc6a95a 100644
--- a/Source/core/editing/TextIterator.h
+++ b/Source/core/editing/TextIterator.h
@@ -46,7 +46,8 @@ enum TextIteratorBehavior {
     TextIteratorStopsOnFormControls = 1 << 4,
     TextIteratorEmitsImageAltText = 1 << 5,
     TextIteratorEntersAuthorShadowRoots = 1 << 6,
-    TextIteratorEmitsObjectReplacementCharacter = 1 << 7
+    TextIteratorEmitsObjectReplacementCharacter = 1 << 7,
+    TextIteratorBreakAtZeroLengthBoundary = 1 << 8
 };
 typedef unsigned TextIteratorBehaviorFlags;
 
@@ -119,6 +120,8 @@ public:
     Position startPosition() const;
     Position endPosition() const;
 
+    bool breakAtZeroLengthBoundary() { return m_breakAtZeroLengthBoundary; }
+
     // Computes the length of the given range using a text iterator. The default
     // iteration behavior is to always emit object replacement characters for
     // replaced elements. When |forSelectionPreservation| is set to true, it
@@ -228,6 +231,8 @@ private:
     bool m_entersAuthorShadowRoots;
 
     bool m_emitsObjectReplacementCharacter;
+
+    bool m_breakAtZeroLengthBoundary;
 };
 
 // Iterates through the DOM range, returning all the text, and 0-length boundaries