Add the plumbing to enable DRP

android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java

Index: android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java b/android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java
index 5f710a8deb2aa900e663d5b4617659bf6549924d..38cb569d45d32f683455b0dc983df1e9e0f94325 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java
@@ -45,9 +45,17 @@ public class AwContentsStatics {
         callback.run();
     }
 
+    /**
+     * Enable or disable data reduction proxy.
+     */
+    public static void setDataReductionProxyEnabled(boolean enabled) {
+        ThreadUtils.assertOnUiThread();

[sgurun-gerrit only, 2014/05/06 23:29:24]

will add the same check to the setDataReductionProxyKey method.

+        nativeSetDataReductionProxyEnabled(enabled);
+    }
+
     //--------------------------------------------------------------------------------------------
     //  Native methods
     //--------------------------------------------------------------------------------------------
     private static native void nativeClearClientCertPreferences(Runnable callback);
-
+    private static native void nativeSetDataReductionProxyEnabled(boolean enabled);
 }