Replace ASSERT and ASSERT_NOT_REACHED in core/style/

third_party/WebKit/Source/core/style/BorderImageLength.h

Index: third_party/WebKit/Source/core/style/BorderImageLength.h
diff --git a/third_party/WebKit/Source/core/style/BorderImageLength.h b/third_party/WebKit/Source/core/style/BorderImageLength.h
index 50c9ee3996440ed7e0774f1446d65c69a6f66c0b..2eaf27cbf81db25da881b61e76d031704bcd57c0 100644
--- a/third_party/WebKit/Source/core/style/BorderImageLength.h
+++ b/third_party/WebKit/Source/core/style/BorderImageLength.h
@@ -53,16 +53,16 @@ class BorderImageLength {
   bool isLength() const { return m_type == LengthType; }
 
   const Length& length() const {
-    ASSERT(isLength());
+    DCHECK(isLength());
     return m_length;
   }
   Length& length() {
-    ASSERT(isLength());
+    DCHECK(isLength());
     return m_length;
   }
 
   double number() const {
-    ASSERT(isNumber());
+    DCHECK(isNumber());
     return m_number;
   }
 
@@ -75,7 +75,7 @@ class BorderImageLength {
     if (isLength())
       return m_length.isZero();
 
-    ASSERT(isNumber());
+    DCHECK(isNumber());
     return !m_number;
   }