Introduce DragController::hasCaretIn()

third_party/WebKit/Source/core/editing/DragCaretController.cpp

Index: third_party/WebKit/Source/core/editing/DragCaretController.cpp
diff --git a/third_party/WebKit/Source/core/editing/DragCaretController.cpp b/third_party/WebKit/Source/core/editing/DragCaretController.cpp
index 32464e386ed3ea5f1d058feaf2096c576cc54a0d..b19c5fffb3bb841da91e8bcb8d0ee7963dfa8ddc 100644
--- a/third_party/WebKit/Source/core/editing/DragCaretController.cpp
+++ b/third_party/WebKit/Source/core/editing/DragCaretController.cpp
@@ -26,6 +26,7 @@
 #include "core/editing/DragCaretController.h"
 
 #include "core/editing/EditingUtilities.h"
+#include "core/frame/Settings.h"
 #include "core/layout/api/LayoutViewItem.h"
 #include "core/paint/PaintLayer.h"
 
@@ -41,6 +42,19 @@ DragCaretController* DragCaretController::create()
     return new DragCaretController;
 }
 
+bool DragCaretController::hasCaretIn(const LayoutBlock& layoutBlock) const
+{
+    Node* node = m_position.deepEquivalent().anchorNode();
+    if (!node)
+        return false;
+    if (layoutBlock != CaretBase::caretLayoutObject(node))
+        return false;
+    if (rootEditableElementOf(m_position))
+        return true;
+    Settings* settings = node->ownerDocument()->frame()->settings();
+    return settings && settings->caretBrowsingEnabled();
+}
+
 bool DragCaretController::isContentRichlyEditable() const
 {
     return isRichlyEditablePosition(m_position.deepEquivalent());
@@ -102,16 +116,6 @@ DEFINE_TRACE(DragCaretController)
     visitor->trace(m_caretBase);
 }
 
-LayoutBlock* DragCaretController::caretLayoutObject() const
-{
-    return CaretBase::caretLayoutObject(m_position.deepEquivalent().anchorNode());
-}
-
-bool DragCaretController::isContentEditable() const
-{
-    return rootEditableElementOf(m_position);
-}
-
 void DragCaretController::paintDragCaret(LocalFrame* frame, GraphicsContext& context, const LayoutPoint& paintOffset) const
 {
     if (m_position.deepEquivalent().anchorNode()->document().frame() == frame)