Fix errors caused by unsafe conversions to/from size_t

third_party/WebKit/Source/core/loader/DocumentThreadableLoader.cpp

Index: third_party/WebKit/Source/core/loader/DocumentThreadableLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.cpp b/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.cpp
index 2130a3e72e4d06321bc285a315389a15cd616edb..a720a08c58adb28155936ea3c60061919ebd7fa1 100644
--- a/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.cpp
@@ -647,7 +647,7 @@ void DocumentThreadableLoader::setSerializedCachedMetadata(Resource*, const char
     // |this| may be dead here.
 }
 
-void DocumentThreadableLoader::dataReceived(Resource* resource, const char* data, unsigned dataLength)
+void DocumentThreadableLoader::dataReceived(Resource* resource, const char* data, size_t dataLength)
 {
     ASSERT_UNUSED(resource, resource == this->resource());
     ASSERT(m_async);
@@ -655,11 +655,13 @@ void DocumentThreadableLoader::dataReceived(Resource* resource, const char* data
     if (m_isUsingDataConsumerHandle)
         return;
 
-    handleReceivedData(data, dataLength);
+    // TODO(junov): Fix the ThreadableLoader ecosystem to use size_t.
+    // Until then, we use safeCast to trap potential overflows.
+    handleReceivedData(data, safeCast<unsigned>(dataLength));
     // |this| may be dead here.
 }
 
-void DocumentThreadableLoader::handleReceivedData(const char* data, unsigned dataLength)
+void DocumentThreadableLoader::handleReceivedData(const char* data, size_t dataLength)
 {
     ASSERT(m_client);