Move the DidLoadResourceFromMemoryCache IPC to be frame-based.

BUG=304341
TEST=existing tests

Review URL: https://codereview.chromium.org/1304833005

Cr-Commit-Position: refs/heads/master@{#346522}
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index a185bdc..789b8d3 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -618,7 +618,7 @@
                         OnMediaPausedNotification)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidFirstVisuallyNonEmptyPaint,
                         OnFirstVisuallyNonEmptyPaint)
-    IPC_MESSAGE_HANDLER(ViewHostMsg_DidLoadResourceFromMemoryCache,
+    IPC_MESSAGE_HANDLER(FrameHostMsg_DidLoadResourceFromMemoryCache,
                         OnDidLoadResourceFromMemoryCache)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidDisplayInsecureContent,
                         OnDidDisplayInsecureContent)