Fix crash when clicking BROWSE THE PHYSICAL WEB

chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebDiagnosticsPage.java

Index: chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebDiagnosticsPage.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebDiagnosticsPage.java b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebDiagnosticsPage.java
index 32a7d7a12b421d8a5583fcf9a2ccba67436b8f2a..4ad71134d27edbe753a11e4e73eafa1ebc7b40e4 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebDiagnosticsPage.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWebDiagnosticsPage.java
@@ -47,7 +47,7 @@ public class PhysicalWebDiagnosticsPage extends BasicNativePage {
     }
 
     @Override
-    protected void initialize(Activity activity, Tab tab) {
+    protected void initialize(final Activity activity, Tab tab) {
         Resources resources = activity.getResources();
         mSuccessColor = colorToHexValue(ApiCompatibilityUtils.getColor(resources,
                 R.color.physical_web_diags_success_color));
@@ -63,7 +63,7 @@ public class PhysicalWebDiagnosticsPage extends BasicNativePage {
         mLaunchButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                ContextUtils.getApplicationContext().startActivity(createListUrlsIntent());
+                activity.startActivity(createListUrlsIntent());
             }
         });