Reland of Android: Add support for TraceEvent before the native library is loaded.

chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java
index 411b08ebd0dd0ed68426e9881b84c18c38b90f29..5c9a66549cfb9c2294c7de4c0488a7519e8f1a92 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java
@@ -116,16 +116,22 @@ public class ChromeLauncherActivity extends Activity
     public void onCreate(Bundle savedInstanceState) {
         // Third-party code adds disk access to Activity.onCreate. http://crbug.com/619824
         StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
+        TraceEvent.begin("ChromeLauncherActivity");
+        TraceEvent.begin("ChromeLauncherActivity.onCreate");
         try {
-            super.onCreate(savedInstanceState);
+            doOnCreate(savedInstanceState);
         } finally {
             StrictMode.setThreadPolicy(oldPolicy);
+            TraceEvent.end("ChromeLauncherActivity.onCreate");
         }
+    }
+
+    private final void doOnCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
         // This Activity is only transient. It launches another activity and
         // terminates itself. However, some of the work is performed outside of
         // {@link Activity#onCreate()}. To capture this, the TraceEvent starts
         // in onCreate(), and ends in onPause().
-        TraceEvent.begin("ChromeLauncherActivity");
         // Needs to be called as early as possible, to accurately capture the
         // time at which the intent was received.
         IntentHandler.addTimestampToIntent(getIntent());
@@ -231,8 +237,8 @@ public class ChromeLauncherActivity extends Activity
     }
 
     @Override
-    public void onPause() {
-        super.onPause();
+    public void onDestroy() {
+        super.onDestroy();
         TraceEvent.end("ChromeLauncherActivity");
     }