Add notification of data reduction proxy field trial

chrome/android/java/src/org/chromium/chrome/browser/infobar/DataReductionProxyInfoBar.java

Index: chrome/android/java/src/org/chromium/chrome/browser/infobar/DataReductionProxyInfoBar.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/infobar/DataReductionProxyInfoBar.java b/chrome/android/java/src/org/chromium/chrome/browser/infobar/DataReductionProxyInfoBar.java
new file mode 100644
index 0000000000000000000000000000000000000000..4d1b2bcce8c30d587f078a8f7ea8300525c630e7
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/infobar/DataReductionProxyInfoBar.java
@@ -0,0 +1,52 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.infobar;
+
+import android.content.Context;
+import android.content.Intent;
+import android.preference.PreferenceActivity;
+
+import org.chromium.content_public.browser.WebContents;
+
+/**
+ * Generates an InfoBar for the data reduction proxy that contains a message and a link to the
+ * data reduction proxy settings menu.
+ */
+public class DataReductionProxyInfoBar extends ConfirmInfoBar {
+    private static String sSettingsClassName;
+    private static String sDataReductionProxySettingsClassName;
+    private static String sTitle;
+    private static String sLinkText;
+
+    public static void launch(WebContents webContents,

[aruslan, 2014/07/15 23:14:28]

nit: javadoc + why it is setting static variables.

[bengr, 2014/07/16 00:43:25]

Done. The alternative was to pass this info to native and have native send it
back. This is more efficient.

+            String settingsClassName,
+            String drpSettingsClassName,
+            String title,
+            String linkText) {
+        sSettingsClassName = settingsClassName;
+        sDataReductionProxySettingsClassName = drpSettingsClassName;
+        sTitle = title;
+        sLinkText = linkText;
+        DataReductionProxyInfoBarDelegate.launch(webContents);
+    }
+
+    DataReductionProxyInfoBar(long nativeInfoBar, int iconDrawableId) {
+        super(nativeInfoBar, null, iconDrawableId, sTitle,
+                sLinkText, null, null);
+    }
+
+    @Override
+    public void onLinkClicked() {
+        Context context = getContext();
+        if (context == null) return;
+        Intent intent = new Intent(Intent.ACTION_VIEW);
+        intent.setClassName(context, sSettingsClassName);
+        intent.setFlags(
+                Intent.FLAG_ACTIVITY_REORDER_TO_FRONT | Intent.FLAG_ACTIVITY_SINGLE_TOP);
+        intent.putExtra(PreferenceActivity.EXTRA_SHOW_FRAGMENT,
+                sDataReductionProxySettingsClassName);
+        context.startActivity(intent);
+    }
+}