Add support for TraceEvent before the native library is loaded.

content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java

Index: content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java b/content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java
index 5a12ca69bebf182e55db7b91ace698ead2daef9a..eebb911dd4784d4c31634422ed179f8869c53cf7 100644
--- a/content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java
+++ b/content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java
@@ -12,6 +12,7 @@ import org.chromium.base.CalledByNative;
 import org.chromium.base.JNINamespace;
 import org.chromium.base.ResourceExtractor;
 import org.chromium.base.ThreadUtils;
+import org.chromium.base.TraceEvent;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.library_loader.LibraryLoader;
 import org.chromium.base.library_loader.LoaderErrors;
@@ -247,6 +248,7 @@ public class BrowserStartupController {
 
     @VisibleForTesting
     void prepareToStartBrowserProcess(boolean singleProcess) throws ProcessInitException {
+        TraceEvent.begin("BrowserStartupController.prepareToStartBrowserProcess");

[dsinclair, 2015/02/09 21:11:20]

Seems unrelated to this CL, can you pull it out?

[Benoit L, 2015/02/10 15:31:35]

Done.

         Log.i(TAG, "Initializing chromium process, singleProcess=" + singleProcess);
 
         // Normally Main.java will have kicked this off asynchronously for Chrome. But other
@@ -268,6 +270,8 @@ public class BrowserStartupController {
 
         nativeSetCommandLineFlags(singleProcess, nativeIsPluginEnabled() ? getPlugins() : null);
         ContentMain.initApplicationContext(appContext);
+
+        TraceEvent.end("BrowserStartupController.prepareToStartBrowserProcess");
     }
 
     /**