Render process changes for ResourceTiming sizes.

third_party/WebKit/public/platform/WebURLLoaderClient.h

Index: third_party/WebKit/public/platform/WebURLLoaderClient.h
diff --git a/third_party/WebKit/public/platform/WebURLLoaderClient.h b/third_party/WebKit/public/platform/WebURLLoaderClient.h
index 41b7bee7db94cf0f07c1b382f38b047b64651e6c..9f93cbcc6957dc7248204a69f181227ec86583e2 100644
--- a/third_party/WebKit/public/platform/WebURLLoaderClient.h
+++ b/third_party/WebKit/public/platform/WebURLLoaderClient.h
@@ -45,8 +45,10 @@ class BLINK_PLATFORM_EXPORT WebURLLoaderClient {
 public:
     // Called when following a redirect. |newRequest| contains the request
     // generated by the redirect. The client may modify |newRequest|.
+    // |encodedDataLength| is the size of the data that came from the network
+    // for this redirect, or zero if the redirect was served from cache.
     virtual void willFollowRedirect(
-        WebURLLoader*, WebURLRequest& newRequest, const WebURLResponse& redirectResponse) { }
+        WebURLLoader*, WebURLRequest& newRequest, const WebURLResponse& redirectResponse, int64_t encodedDataLength) {}
 
     // Called to report upload progress. The bytes reported correspond to
     // the HTTP message body.
@@ -68,8 +70,17 @@ public:
     // if WebURLRequest's downloadToFile flag was set to true.
     virtual void didDownloadData(WebURLLoader*, int dataLength, int encodedDataLength) { }
 
-    // Called when a chunk of response data is received.
-    virtual void didReceiveData(WebURLLoader*, const char* data, int dataLength, int encodedDataLength) { }
+    // Called when a chunk of response data is received. |dataLength| is the
+    // number of bytes pointed to by |data|. |encodedDataLength| is the number
+    // of bytes actually received from network to serve this chunk, including
+    // HTTP headers and framing if relevant. It is 0 if the response was served
+    // from cache, and -1 if this information is unavailable.
+    // TODO(ricea): -1 is problematic for consumers maintaining a running
+    //     total. Investigate using 0 for all unavailable cases.
+    // |encodedBodyLength| is the number of bytes used to store this chunk,
+    // possibly encrypted, excluding headers or framing. It is set even if the
+    // response was served from cache.
+    virtual void didReceiveData(WebURLLoader*, const char* data, int dataLength, int encodedDataLength, int encodedBodyLength) {}
 
     // Called when a chunk of renderer-generated metadata is received from the cache.
     virtual void didReceiveCachedMetadata(WebURLLoader*, const char* data, int dataLength) { }