bindings: Add assersion in v8AtomicString

Source/bindings/core/v8/V8Binding.h

 /*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 * Copyright (C) 2012 Ericsson AB. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
@@ skipping 336 matching lines @@
         return v8::String::Empty(isolate);
     return V8PerIsolateData::from(isolate)->stringCache()->v8ExternalString(string.impl(), isolate);
 }
 
 inline v8::Handle<v8::String> v8AtomicString(v8::Isolate* isolate, const char* str, int length = -1)
 {
     ASSERT(isolate);
     v8::Local<v8::String> value;
     if (LIKELY(v8::String::NewFromUtf8(isolate, str, v8::NewStringType::kInternalized, length).ToLocal(&value)))
         return value;
+    // Immediately crashes when NewFromUtf8() fails because it only fails the
+    // given str is too long.
+    RELEASE_ASSERT_NOT_REACHED();
     return v8::String::Empty(isolate);
 }
 
 inline v8::Handle<v8::Value> v8Undefined()
 {
     return v8::Handle<v8::Value>();
 }
 
 // Conversion flags, used in toIntXX/toUIntXX.
 enum IntegerConversionConfiguration {
@@ skipping 602 matching lines @@
 PassRefPtr<TraceEvent::ConvertableToTraceFormat> devToolsTraceEventData(v8::Isolate*, ExecutionContext*, v8::Handle<v8::Function>);
 
 // Callback functions used by generated code.
 CORE_EXPORT void v8ConstructorAttributeGetter(v8::Local<v8::Name> propertyName, const v8::PropertyCallbackInfo<v8::Value>&);
 
 typedef void (*InstallTemplateFunction)(v8::Local<v8::FunctionTemplate>, v8::Isolate*);
 
 } // namespace blink
 
 #endif // V8Binding_h