Move PathUtils to use ContextUtils.

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

Index: base/android/java/src/org/chromium/base/PathUtils.java
diff --git a/base/android/java/src/org/chromium/base/PathUtils.java b/base/android/java/src/org/chromium/base/PathUtils.java
index 1546e001b94f7bb08232759f7bbcddbbcf5a0a9c..00977d56d576ac94335c6ab0578a86c75b1c2833 100644
--- a/base/android/java/src/org/chromium/base/PathUtils.java
+++ b/base/android/java/src/org/chromium/base/PathUtils.java
@@ -34,13 +34,9 @@ public abstract class PathUtils {
     private static final AtomicBoolean sInitializationStarted = new AtomicBoolean();
     private static AsyncTask<Void, Void, String[]> sDirPathFetchTask;
 
-    // In setPrivateDataDirectorySuffix(), we store the app's context. If the AsyncTask started in
-    // setPrivateDataDirectorySuffix() fails to complete by the time we need the values, we will
-    // need the context so that we can restart the task synchronously on the UI thread.
-    private static Context sDataDirectoryAppContext;
-
-    // We also store the directory path suffix from setPrivateDataDirectorySuffix() for the same
-    // reason as above.
+    // If the AsyncTask started in setPrivateDataDirectorySuffix() fails to complete by the time we
+    // need the values, we will need the suffix so that we can restart the task synchronously on
+    // the UI thread.
     private static String sDataDirectorySuffix;
 
     // Prevent instantiation.
@@ -101,13 +97,14 @@ public abstract class PathUtils {
      */
     private static String[] setPrivateDataDirectorySuffixInternal() {
         String[] paths = new String[NUM_DIRECTORIES];
-        paths[DATA_DIRECTORY] = sDataDirectoryAppContext.getDir(sDataDirectorySuffix,
-                Context.MODE_PRIVATE).getPath();
-        paths[THUMBNAIL_DIRECTORY] = sDataDirectoryAppContext.getDir(
+        Context appContext = ContextUtils.getApplicationContext();
+        paths[DATA_DIRECTORY] = appContext.getDir(
+                sDataDirectorySuffix, Context.MODE_PRIVATE).getPath();
+        paths[THUMBNAIL_DIRECTORY] = appContext.getDir(
                 THUMBNAIL_DIRECTORY_NAME, Context.MODE_PRIVATE).getPath();
-        paths[DATABASE_DIRECTORY] = sDataDirectoryAppContext.getDatabasePath("foo").getParent();
-        if (sDataDirectoryAppContext.getCacheDir() != null) {
-            paths[CACHE_DIRECTORY] = sDataDirectoryAppContext.getCacheDir().getPath();
+        paths[DATABASE_DIRECTORY] = appContext.getDatabasePath("foo").getParent();
+        if (appContext.getCacheDir() != null) {
+            paths[CACHE_DIRECTORY] = appContext.getCacheDir().getPath();
         }
         return paths;
     }
@@ -124,12 +121,12 @@ public abstract class PathUtils {
      * @param suffix The private data directory suffix.
      * @see Context#getDir(String, int)
      */
-    public static void setPrivateDataDirectorySuffix(String suffix, Context context) {
+    public static void setPrivateDataDirectorySuffix(String suffix) {
         // This method should only be called once, but many tests end up calling it multiple times,
         // so adding a guard here.
         if (!sInitializationStarted.getAndSet(true)) {
+            assert ContextUtils.getApplicationContext() != null;
             sDataDirectorySuffix = suffix;
-            sDataDirectoryAppContext = context.getApplicationContext();
             sDirPathFetchTask = new AsyncTask<Void, Void, String[]>() {
                 @Override
                 protected String[] doInBackground(Void... unused) {