Move Cronet metrics-related classes into their own files

components/cronet/android/BUILD.gn

Index: components/cronet/android/BUILD.gn
diff --git a/components/cronet/android/BUILD.gn b/components/cronet/android/BUILD.gn
index e67d4b227bd97a97e30b362bbaa6a984e8aab176..3f3ed4bc60ded282e7664689ec509f2f87ac808a 100644
--- a/components/cronet/android/BUILD.gn
+++ b/components/cronet/android/BUILD.gn
@@ -287,7 +287,7 @@ android_library("cronet_api") {
     "api/src/org/chromium/net/NetworkQualityThroughputListener.java",
     "api/src/org/chromium/net/Preconditions.java",
     "api/src/org/chromium/net/QuicException.java",
-    "api/src/org/chromium/net/RequestFinishedListener.java",
+    "api/src/org/chromium/net/RequestFinishedInfo.java",
     "api/src/org/chromium/net/ResponseTooLargeException.java",
     "api/src/org/chromium/net/UploadDataProvider.java",
     "api/src/org/chromium/net/UploadDataProviders.java",
@@ -613,7 +613,7 @@ android_library("cronet_javatests") {
     "test/javatests/src/org/chromium/net/NetworkChangeNotifierTest.java",
     "test/javatests/src/org/chromium/net/PkpTest.java",
     "test/javatests/src/org/chromium/net/QuicTest.java",
-    "test/javatests/src/org/chromium/net/RequestFinishedListenerTest.java",
+    "test/javatests/src/org/chromium/net/RequestFinishedInfoTest.java",
     "test/javatests/src/org/chromium/net/SdchTest.java",
     "test/javatests/src/org/chromium/net/TestBidirectionalStreamCallback.java",
     "test/javatests/src/org/chromium/net/TestDrivenDataProvider.java",