AW: fix TraceEvent typo

No change to production logic, just fixes a mistake with tracing.

I made a copy-paste error when adding TraceEvents for
onSafeBrowsingHit(). This makes sure we end the correct TraceEvent by
using the correct string.

Test: N/A
Change-Id: I7cb58f6ef474d0c38d88093d2e7aca2d66f0e8a0
Reviewed-on: https://chromium-review.googlesource.com/1079888Reviewed-by: Bo <boliu@chromium.org>
Commit-Queue: Nate Fischer <ntfschr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563005}

android_webview/glue/java/src/com/android/webview/chromium/WebViewContentsClientAdapter.java

@@ -630,7 +630,7 @@ class WebViewContentsClientAdapter extends AwContentsClient {
                         /* reporting */ true));
             }
         } finally {
-            TraceEvent.end("WebViewContentsClientAdapter.onRenderProcessGone");
+            TraceEvent.end("WebViewContentsClientAdapter.onSafeBrowsingHit");
         }
     }