Improve Crypto::getRandomValues exception messages.

Source/bindings/v8/ExceptionState.cpp

 /*
  * Copyright (C) 2013 Google Inc. 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "bindings/v8/ExceptionState.h"
 
+#include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/V8ThrowException.h"
 #include "core/dom/ExceptionCode.h"
 
 namespace WebCore {
 
 void ExceptionState::clearException()
 {
     m_code = 0;
     m_exception.clear();
 }
 
 void ExceptionState::throwDOMException(const ExceptionCode& ec, const String& message)
 {
     ASSERT(ec);
     ASSERT(m_isolate);
 
     // SecurityError is thrown via ::throwSecurityError, and _careful_ consideration must be given to the data exposed to JavaScript via the 'sanitizedMessage'.
     ASSERT(ec != SecurityError);
 
+    String processedMessage = message;
+    if (propertyName() && interfaceName() && m_context != UnknownContext) {
+        if (m_context == DeletionContext)
+            processedMessage = ExceptionMessages::failedToDelete(propertyName(), interfaceName(), message);
+        else if (m_context == ExecutionContext)
+            processedMessage = ExceptionMessages::failedToExecute(propertyName(), interfaceName(), message);
+        else if (m_context == GetterContext)
+            processedMessage = ExceptionMessages::failedToGet(propertyName(), interfaceName(), message);
+        else if (m_context == SetterContext)
+            processedMessage = ExceptionMessages::failedToSet(propertyName(), interfaceName(), message);
+    } else if (!propertyName() && interfaceName() && m_context == ConstructionContext) {
+        processedMessage = ExceptionMessages::failedToConstruct(interfaceName(), message);
+    }
+
     m_code = ec;
-    setException(V8ThrowException::createDOMException(ec, message, m_creationContext, m_isolate));
+    setException(V8ThrowException::createDOMException(ec, processedMessage, m_creationContext, m_isolate));
 }
 
 void ExceptionState::throwSecurityError(const String& sanitizedMessage, const String& unsanitizedMessage)
 {
     ASSERT(m_isolate);
     m_code = SecurityError;
     setException(V8ThrowException::createDOMException(SecurityError, sanitizedMessage, unsanitizedMessage, m_creationContext, m_isolate));
 }
 
 void ExceptionState::setException(v8::Handle<v8::Value> exception)
@@ skipping 23 matching lines @@
 {
     m_code = TypeError;
 }
 
 void TrackExceptionState::throwSecurityError(const String&, const String&)
 {
     m_code = SecurityError;
 }
 
 } // namespace WebCore