Don't show a placeholder if the response contains the full image.

third_party/WebKit/Source/platform/network/HTTPParsers.cpp

Index: third_party/WebKit/Source/platform/network/HTTPParsers.cpp
diff --git a/third_party/WebKit/Source/platform/network/HTTPParsers.cpp b/third_party/WebKit/Source/platform/network/HTTPParsers.cpp
index bd5257dece6b4a7ce03560d17ba556f50cd38c51..805948d6a3c19e12500ce4f577b507d7f39f94a0 100644
--- a/third_party/WebKit/Source/platform/network/HTTPParsers.cpp
+++ b/third_party/WebKit/Source/platform/network/HTTPParsers.cpp
@@ -910,4 +910,13 @@ std::unique_ptr<JSONArray> parseJSONHeader(const String& header,
   return JSONArray::from(std::move(headerValue));
 }
 
+bool parseContentRangeHeader(const String& contentRange,
+                             int64_t* firstBytePosition,
+                             int64_t* lastBytePosition,
+                             int64_t* instanceLength) {
+  return net::HttpUtil::ParseContentRangeHeader(
+      StringUTF8Adaptor(contentRange).asStringPiece(), firstBytePosition,
+      lastBytePosition, instanceLength);
+}
+
 }  // namespace blink