Make the Location is Allowed link take the Geo Header into account.

chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
index 6d2d8c50cb10f63235fb2aed25ce8dad250532be..cc43f68a3fb5f617ff4d0cd362c9dc57dd0a4ea5 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
@@ -6,6 +6,7 @@ package org.chromium.chrome.browser.preferences;
 
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.net.Uri;
 import android.preference.PreferenceManager;
 import android.text.TextUtils;
 import android.util.Log;
@@ -13,6 +14,7 @@ import android.util.Log;
 import org.chromium.base.CalledByNative;
 import org.chromium.base.ThreadUtils;
 import org.chromium.chrome.browser.ContentSettingsType;
+import org.chromium.chrome.browser.UrlUtilities;
 import org.chromium.chrome.browser.preferences.website.ContentSetting;
 import org.chromium.chrome.browser.preferences.website.ContentSettingException;
 import org.chromium.chrome.browser.preferences.website.GeolocationInfo;
@@ -21,6 +23,7 @@ import org.chromium.chrome.browser.search_engines.TemplateUrlService;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Locale;
 
 /**
  * PrefServiceBridge is a singleton which provides access to some native preferences. Ideally
@@ -44,6 +47,8 @@ public final class PrefServiceBridge {
 
     private static String sProfilePath;
 
+    private static final String HTTPS_SCHEME = "https";
+
     // Object to notify when "clear browsing data" completes.
     private OnClearBrowsingDataListener mClearBrowsingDataListener;
     private static final String LOG_TAG = "PrefServiceBridge";
@@ -178,6 +183,55 @@ public final class PrefServiceBridge {
     }
 
     /**
+     * Whether the geo header is allowed to be sent for the current URL.
+     * @param context The Context used to get the device location.
+     * @param url The URL of the request with which this header will be sent.
+     * @param isIncognito Whether the request will happen in an incognito tab.
+     */
+    public static boolean isGeoHeaderEnabledForUrl(
+            Context context, String url, boolean isIncognito) {
+        // TODO(finnur): delete this method once GeolocationHeader has been upstreamed.
+        // Only send the Geo header in normal mode.
+        if (isIncognito) return false;
+
+        // Only send the Geo header to Google domains.
+        if (!UrlUtilities.nativeIsGoogleSearchUrl(url)) return false;
+
+        Uri uri = Uri.parse(url);
+        if (!HTTPS_SCHEME.equals(uri.getScheme())) return false;
+
+        // Only send Geo header if the user hasn't disabled geolocation for url.
+        if (isLocationDisabledForUrl(uri)) return false;
+
+        return true;
+    }
+
+    /**
+     * Returns true if the user has disabled sharing their location with url (e.g. via the
+     * geolocation infobar). If the user has not chosen a preference for url and url uses the https
+     * scheme, this considers the user's preference for url with the http scheme instead.
+     */
+    public static boolean isLocationDisabledForUrl(Uri uri) {
+        // TODO(finnur): Delete this method once GeolocationHeader has been upstreamed.
+        GeolocationInfo locationSettings = new GeolocationInfo(uri.toString(), null);
+        ContentSetting locationPermission = locationSettings.getContentSetting();
+
+        // If no preference has been chosen and the scheme is https, fall back to the preference for
+        // this same host over http with no explicit port number.
+        if (locationPermission == null || locationPermission == ContentSetting.ASK) {
+            String scheme = uri.getScheme();
+            if (scheme != null && scheme.toLowerCase(Locale.US).equals("https")
+                    && uri.getAuthority() != null && uri.getUserInfo() == null) {
+                String urlWithHttp = "http://" + uri.getHost();
+                locationSettings = new GeolocationInfo(urlWithHttp, null);
+                locationPermission = locationSettings.getContentSetting();
+            }
+        }
+
+        return locationPermission == ContentSetting.BLOCK;
+    }
+
+    /**
      * Returns the path to the user's profile directory via a callback. The callback may be
      * called synchronously or asynchronously.
      */