Fix errors caused by unsafe conversions to/from size_t

third_party/WebKit/Source/core/fetch/RawResourceTest.cpp

Index: third_party/WebKit/Source/core/fetch/RawResourceTest.cpp
diff --git a/third_party/WebKit/Source/core/fetch/RawResourceTest.cpp b/third_party/WebKit/Source/core/fetch/RawResourceTest.cpp
index 3a949a6cc616f02a750bc82bc5e8eddfc5a16ea5..ed4b9885720382bf2f14580e639d1948e269e82a 100644
--- a/third_party/WebKit/Source/core/fetch/RawResourceTest.cpp
+++ b/third_party/WebKit/Source/core/fetch/RawResourceTest.cpp
@@ -70,7 +70,7 @@ public:
     }
     String debugName() const override { return "DummyClient"; }
 
-    void dataReceived(Resource*, const char* data, unsigned length) override
+    void dataReceived(Resource*, const char* data, size_t length) override
     {
         m_data.append(data, length);
     }