Centralize the Data Reduction Proxy pass through header

chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java

Index: chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java b/chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java
index 32664f546356525640aae4cea14fb0ccead1263d..e7b8cada57cd710616526c020c21e6d4cc2cdab8 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java
@@ -284,6 +284,16 @@ public class DataReductionProxySettings {
         return nativeGetDailyReceivedContentLengths(mNativeDataReductionProxySettings);
     }
 
+    /**
+     * Returns the header used to request a data reduction proxy pass through. When a request is
+     * sent to the data reduction proxy with this header, it will respond with the original
+     * uncompressed response.
+     * @return The data reduction proxy pass through header.
+     */
+    public String getDataReductionProxyPassThroughHeader() {
+        return nativeGetDataReductionProxyPassThroughHeader(mNativeDataReductionProxySettings);
+    }
+
     /**
      * Determines if the data reduction proxy is currently unreachable.
      * @return true if the data reduction proxy is unreachable.
@@ -402,6 +412,8 @@ public class DataReductionProxySettings {
             long nativeDataReductionProxySettingsAndroid);
     private native long[] nativeGetDailyReceivedContentLengths(
             long nativeDataReductionProxySettingsAndroid);
+    private native String nativeGetDataReductionProxyPassThroughHeader(
+            long nativeDataReductionProxySettingsAndroid);
     private native boolean nativeIsDataReductionProxyUnreachable(
             long nativeDataReductionProxySettingsAndroid);
     private native boolean nativeAreLoFiPreviewsEnabled(