Replace all occurrences of RELEASE_ASSERT in wtf with CHECK.

third_party/WebKit/Source/wtf/text/StringImpl.h

Index: third_party/WebKit/Source/wtf/text/StringImpl.h
diff --git a/third_party/WebKit/Source/wtf/text/StringImpl.h b/third_party/WebKit/Source/wtf/text/StringImpl.h
index 161fa19be061c9ad496f7190c45a2f565eda7fc0..eaf077a7371ca90940ca996c9327900bc18c478d 100644
--- a/third_party/WebKit/Source/wtf/text/StringImpl.h
+++ b/third_party/WebKit/Source/wtf/text/StringImpl.h
@@ -424,7 +424,7 @@ public:
 private:
     template<typename CharType> static size_t allocationSize(unsigned length)
     {
-        RELEASE_ASSERT(length <= ((std::numeric_limits<unsigned>::max() - sizeof(StringImpl)) / sizeof(CharType)));
+        CHECK_LE(length, (std::numeric_limits<unsigned>::max() - sizeof(StringImpl)) / sizeof(CharType));
         return sizeof(StringImpl) + length * sizeof(CharType);
     }
 
@@ -658,7 +658,7 @@ inline unsigned lengthOfNullTerminatedString(const UChar* string)
     size_t length = 0;
     while (string[length] != UChar(0))
         ++length;
-    RELEASE_ASSERT(length <= std::numeric_limits<unsigned>::max());
+    CHECK_LE(length, std::numeric_limits<unsigned>::max());
     return static_cast<unsigned>(length);
 }