Cleanup for bug 5278763

Variable is not needed, and removing unneeded check

Also throwing an exception if sContext gets set to null.

Change-Id: Ic61ba4c88a162eb730e166f0e9f477e809b51f42

Author: kristianmonsen

core/java/android/webkit/CookieSyncManager.java

@@ -88,6 +88,10 @@ public static synchronized CookieSyncManager getInstance() {
      */
     public static synchronized CookieSyncManager createInstance(
             Context context) {
+        if (context == null) {
+            throw new IllegalArgumentException("Invalid context argument");
+        }
+
         JniUtil.setContext(context);
         Context appContext = context.getApplicationContext();
         if (sRef == null) {

core/java/android/webkit/JniUtil.java

@@ -39,25 +39,21 @@ private JniUtil() {} // Utility class, do not instantiate.
     private static Boolean sUseChromiumHttpStack;
     private static Context sContext;
 
-    private static boolean initialized = false;
-
     private static void checkInitialized() {
-        if (!initialized) {
+        if (sContext == null) {
             throw new IllegalStateException("Call CookieSyncManager::createInstance() or create a webview before using this class");
         }
     }
 
     protected static synchronized void setContext(Context context) {
-        if (initialized)
+        if (sContext != null) {
             return;
+        }
 
         sContext = context.getApplicationContext();
-        initialized = true;
     }
 
     protected static synchronized Context getContext() {
-        if (!initialized)
-            return null;
         return sContext;
     }
 
@@ -68,8 +64,9 @@ protected static synchronized Context getContext() {
     private static synchronized String getDatabaseDirectory() {
         checkInitialized();
 
-        if (sDatabaseDirectory == null)
+        if (sDatabaseDirectory == null) {
             sDatabaseDirectory = sContext.getDatabasePath("dummy").getParent();
+        }
 
         return sDatabaseDirectory;
     }
@@ -81,8 +78,9 @@ private static synchronized String getDatabaseDirectory() {
     private static synchronized String getCacheDirectory() {
         checkInitialized();
 
-        if (sCacheDirectory == null)
+        if (sCacheDirectory == null) {
             sCacheDirectory = sContext.getCacheDir().getAbsolutePath();
+        }
 
         return sCacheDirectory;
     }

core/java/android/webkit/WebView.java

@@ -1050,6 +1050,10 @@ protected WebView(Context context, AttributeSet attrs, int defStyle,
         super(context, attrs, defStyle);
         checkThread();
 
+        if (context == null) {
+            throw new IllegalArgumentException("Invalid context argument");
+        }
+
         // Used by the chrome stack to find application paths
         JniUtil.setContext(context);