ASSERT -> DCHECK conversions in core/editing.

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

Index: third_party/WebKit/Source/core/editing/VisibleSelection.cpp
diff --git a/third_party/WebKit/Source/core/editing/VisibleSelection.cpp b/third_party/WebKit/Source/core/editing/VisibleSelection.cpp
index 2d7fe61c7a85d84df518b75d9c75d9804ed4e27e..7550ddb6512637a6bbeb91d5ca1a1404032765f4 100644
--- a/third_party/WebKit/Source/core/editing/VisibleSelection.cpp
+++ b/third_party/WebKit/Source/core/editing/VisibleSelection.cpp
@@ -622,7 +622,7 @@ void VisibleSelectionTemplate<Strategy>::adjustSelectionToAvoidCrossingEditingBo
             const VisiblePositionTemplate<Strategy> first = firstEditableVisiblePositionAfterPositionInRoot(m_start, *baseRoot);
             m_start = first.deepEquivalent();
             if (m_start.isNull()) {
-                ASSERT_NOT_REACHED();
+                NOTREACHED();
                 m_start = m_end;
             }
         }
@@ -661,7 +661,7 @@ void VisibleSelectionTemplate<Strategy>::adjustSelectionToAvoidCrossingEditingBo
             if (previous.isNull()) {
                 // The selection crosses an Editing boundary.  This is a
                 // programmer error in the editing code.  Happy debugging!
-                ASSERT_NOT_REACHED();
+                NOTREACHED();
                 m_base = PositionTemplate<Strategy>();
                 m_extent = PositionTemplate<Strategy>();
                 validate();
@@ -690,7 +690,7 @@ void VisibleSelectionTemplate<Strategy>::adjustSelectionToAvoidCrossingEditingBo
             if (next.isNull()) {
                 // The selection crosses an Editing boundary.  This is a
                 // programmer error in the editing code.  Happy debugging!
-                ASSERT_NOT_REACHED();
+                NOTREACHED();
                 m_base = PositionTemplate<Strategy>();
                 m_extent = PositionTemplate<Strategy>();
                 validate();