Re-implement UserAgent in browser

- Remove calls to SWE's WebSetting API and use the newer implementation of
  the engine. The newer implementation tracks UserAgent per navigation
  entry.
- Allow to override the UserAgent using command line switches.
- Remove debug option to change UserAgent string.
- BrowserConfig class cleanup.

Change-Id: Ib1cc4763e0cbf0207793d1f4e6b1644a9dbb5c08
diff --git a/src/com/android/browser/BrowserConfigBase.java b/src/com/android/browser/BrowserConfigBase.java
new file mode 100644
index 0000000..c81e593
--- /dev/null
+++ b/src/com/android/browser/BrowserConfigBase.java
@@ -0,0 +1,84 @@
+/*
+    * Copyright (c) 2014, The Linux Foundation. All rights reserved.
+    *
+    * Redistribution and use in source and binary forms, with or without
+    * modification, are permitted provided that the following conditions are
+    * met:
+    * * Redistributions of source code must retain the above copyright
+    * notice, this list of conditions and the following disclaimer.
+    * * Redistributions in binary form must reproduce the above
+    * copyright notice, this list of conditions and the following
+    * disclaimer in the documentation and/or other materials provided
+    * with the distribution.
+    * * Neither the name of The Linux Foundation nor the names of its
+    * contributors may be used to endorse or promote products derived
+    * from this software without specific prior written permission.
+    *
+    * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+    * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+    * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+    * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+    * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+    * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+    * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+    * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+    * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+    * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+    * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+    *
+    */
+
+package com.android.browser;
+
+import com.android.browser.R;
+
+import java.util.Locale;
+
+import android.os.Build;
+import android.content.Context;
+import android.text.TextUtils;
+
+import org.codeaurora.swe.BrowserCommandLine;
+
+abstract class BrowserConfigBase {
+
+    private static final String OVERRIDE_USER_AGENT = "user-agent";
+    private Context mContext;
+
+    public BrowserConfigBase(Context context) {
+        mContext = context;
+    }
+
+    public void overrideUserAgent() {
+        BrowserCommandLine bcl = BrowserCommandLine.getInstance();
+        // Check if the UA is already present using command line file
+        if (bcl.hasSwitch(OVERRIDE_USER_AGENT)) {
+            return;
+        }
+
+        String ua = mContext.getResources().getString(R.string.def_useragent);
+
+        if (TextUtils.isEmpty(ua))
+            return;
+
+        ua = constructUserAgent(ua);
+
+        if (!TextUtils.isEmpty(ua)){
+            bcl.appendSwitchWithValue(OVERRIDE_USER_AGENT, ua);
+        }
+    }
+
+    private String constructUserAgent(String userAgent) {
+        try {
+            userAgent = userAgent.replaceAll("<%build_model>", Build.MODEL);
+            userAgent = userAgent.replaceAll("<%build_version>", Build.VERSION.RELEASE);
+            userAgent = userAgent.replaceAll("<%build_id>", Build.ID);
+            userAgent = userAgent.replaceAll("<%language>", Locale.getDefault().getLanguage());
+            userAgent = userAgent.replaceAll("<%country>", Locale.getDefault().getCountry());
+            return userAgent;
+        } catch (Exception ex) {
+            return null;
+        }
+    }
+}
+