Fix ContextUtils test flakiness.

There was a race condition between Android tests calling
Application#onCreate and TestRunner#runTests which caused flakiness
in some of the UrlManagerTest* and other instrumentation tests.

Initialize the application object earlier so that it is always ready
when tests are run.

BUG=649224,637448

Review-Url: https://codereview.chromium.org/2363323003
Cr-Commit-Position: refs/heads/master@{#421256}

chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java

@@ -92,6 +92,11 @@ public class ChromeApplication extends ContentApplication {
 
     private PrintingController mPrintingController;
 
+    public ChromeApplication() {
+        super();
+        ContextUtils.initApplicationContext(this);
+    }
+
     /**
      * This is called during early initialization in order to set up ChildProcessLauncher
      * for certain Chrome packaging configurations
@@ -113,7 +118,6 @@ public class ChromeApplication extends ContentApplication {
         TraceEvent.begin("ChromeApplication.onCreate");
 
         super.onCreate();
-        ContextUtils.initApplicationContext(this);
 
         TraceEvent.end("ChromeApplication.onCreate");
     }