Move PathUtils to use ContextUtils.

base/android/java/src/org/chromium/base/BaseChromiumApplication.java

Index: base/android/java/src/org/chromium/base/BaseChromiumApplication.java
diff --git a/base/android/java/src/org/chromium/base/BaseChromiumApplication.java b/base/android/java/src/org/chromium/base/BaseChromiumApplication.java
index 353b798f9ec6806e841d7b0120c9ea86853c759f..9bc3eaa95af19b2ea23fa864e6a7148929ae383d 100644
--- a/base/android/java/src/org/chromium/base/BaseChromiumApplication.java
+++ b/base/android/java/src/org/chromium/base/BaseChromiumApplication.java
@@ -42,6 +42,7 @@ public class BaseChromiumApplication extends Application {
     @Override
     protected void attachBaseContext(Context base) {
         super.attachBaseContext(base);
+        assert getBaseContext() != null;
         ChromiumMultiDexInstaller.install(this);
     }
 
@@ -58,7 +59,7 @@ public class BaseChromiumApplication extends Application {
     }
 
     private ObserverList<WindowFocusChangedListener> mWindowFocusListeners =
-            new ObserverList<WindowFocusChangedListener>();
+            new ObserverList<>();
 
     /**
      * Intercepts calls to an existing Window.Callback. Most invocations are passed on directly