Added probe to determine if data reduction proxy can be used

chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.h

Index: chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.h
diff --git a/chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.h b/chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..45ed0e2b3303cb6fd5109d82a991a7ee76a13c8a
--- /dev/null
+++ b/chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.h
@@ -0,0 +1,122 @@
+// Copyright 2013 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.
+
+#ifndef CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_SETTINGS_ANDROID_H_
+#define CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_SETTINGS_ANDROID_H_
+
+#include "base/android/jni_helper.h"
+#include "base/android/jni_string.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/gtest_prod_util.h"
+#include "base/prefs/pref_service.h"
+#include "net/base/network_change_notifier.h"
+#include "net/url_request/url_fetcher.h"
+#include "net/url_request/url_fetcher_delegate.h"
+
+using base::android::ScopedJavaLocalRef;
+
+class DataReductionProxySettingsAndroid

[mmenke, 2013/09/05 21:34:33]

Class should be documented, as should most of these functions.

Also, I'm assuming this lives on the UI thread?  A lot of browser/net stuff
lives on the IO, so this should be documented.

[bengr, 2013/09/10 00:56:09]

Done.

+    : public net::URLFetcherDelegate,
+      public net::NetworkChangeNotifier::IPAddressObserver {
+ public:
+  DataReductionProxySettingsAndroid(JNIEnv* env, jobject obj);
+  virtual ~DataReductionProxySettingsAndroid();
+
+  void InitDataReductionProxySettings(JNIEnv* env, jobject obj);
+
+  jboolean IsDataReductionProxyAvailable(JNIEnv* env, jobject obj);
+  jboolean IsDataReductionProxyPromoAvailable(JNIEnv* env, jobject obj);
+  ScopedJavaLocalRef<jstring> GetDataReductionProxyOrigin(JNIEnv* env,
+                                                          jobject obj);
+  ScopedJavaLocalRef<jstring> GetDataReductionProxyValue(JNIEnv* env,
+                                                         jobject obj);
+
+  jboolean IsDataReductionProxyEnabled(JNIEnv* env, jobject obj);
+  jboolean IsDataReductionProxyManaged(JNIEnv* env, jobject obj);
+  void SetDataReductionProxyEnabled(JNIEnv* env, jobject obj,jboolean enabled);

[mmenke, 2013/09/09 15:40:05]

nit:  Missing space.

[bengr, 2013/09/10 00:56:09]

Done.

+
+  jlong GetDataReductionLastUpdateTime(JNIEnv* env, jobject obj);
+
+  base::android::ScopedJavaLocalRef<jobject> GetContentLengths(JNIEnv* env,
+                                                               jobject obj);
+  ScopedJavaLocalRef<jlongArray> GetDailyOriginalContentLengths(JNIEnv* env,
+                                                                jobject obj);
+  ScopedJavaLocalRef<jlongArray> GetDailyReceivedContentLengths(JNIEnv* env,
+                                                                jobject obj);
+
+  static bool Register(JNIEnv* env);
+
+ private:
+  friend class DataReductionProxySettingsAndroidTest;
+  FRIEND_TEST_ALL_PREFIXES(DataReductionProxySettingsAndroidTest,
+                           TestBypassRules);
+  FRIEND_TEST_ALL_PREFIXES(DataReductionProxySettingsAndroidTest,
+                           TestFormatURL);
+  FRIEND_TEST_ALL_PREFIXES(DataReductionProxySettingsAndroidTest,
+                           TestStatistics);
+
+  // net::URLFetcherDelegate:
+  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
+
+
+  // NetworkChangeNotifier::IPAddressObserver:
+  virtual void OnIPAddressChanged() OVERRIDE;
+
+  bool IsDataReductionProxyAvailable();
+  bool IsDataReductionProxyPromoAvailable();
+
+  void AddDefaultProxyBypassRules();
+  void AddURLPatternToBypass(const std::string& pattern);
+  void AddHostPatternToBypass(const std::string& pattern);
+  void AddPatternToBypass(const std::string& url_or_host,
+                          const std::string& pattern);
+  void AddHostToBypass(const std::string& host);
+  void AddURLSubstringToBypass(const std::string& url, int from, int to);
+
+  PrefService* GetPrefService();
+  PrefService* GetLocalState();
+  void set_pref_service(PrefService* pref_service);
+  void set_local_state(PrefService* local_state);

[mmenke, 2013/09/05 21:34:33]

If this is only intended for testing, the name should be
set_local_state_for_testing()

[bengr, 2013/09/10 00:56:09]

Done.

+
+
+  std::string GetDataReductionProxyOriginHostPort();
+  void RemoveSchemeAndTrailingSlash(std::string* url);
+  void ResetDataReductionStatistics();
+
+  void SetProxyPac(bool enable_spdy_proxy, bool at_startup);
+
+  std::string GetProxyCheckURL();
+
+  ScopedJavaLocalRef<jlongArray> GetDailyContentLengths(JNIEnv* env,
+                                                        const char* pref_name);
+  void GetContentLengths(int days,
+                         int64* original_content_length,
+                         int64* received_content_length,
+                         int64* last_update_time);
+
+  void CheckDataReductionProxyIsAvailable(std::string url);
+
+  std::string GetProxyPacScript();
+
+  std::vector<std::string> bypass_rules_;
+
+  // Indicate whether a user has turned on SPDY proxy auth previously in this
+  // session.

[mmenke, 2013/09/09 15:40:05]

I'm not really follow...This is SPDY proxy auth specifically for the data
reduction policy, right, and not in general?

[bengr, 2013/09/10 00:56:09]

Done. The data reduction proxy had been called "SPDY proxy auth" for various
reasons. I'm slowly updating the code to refer to it as the data reduction
proxy.

+  bool has_turned_on_;
+
+  // Indicate whether a user has turned off SPDY proxy auth previously in this
+  // session.
+  bool has_turned_off_;
+
+  bool disabled_by_carrier_;
+  bool enabled_by_user_;
+
+  scoped_ptr<net::URLFetcher> fetcher_;
+  PrefService* pref_service_;
+  PrefService* local_state_;

[mmenke, 2013/09/05 21:34:33]

I don't think it's at all clear what the difference between these two is.

[mmenke, 2013/09/09 15:40:05]

Also, if these are only used for unit tests, they should be renamed to
*_for_testing_.

[bengr, 2013/09/10 00:56:09]

Done.

[bengr, 2013/09/10 00:56:09]

Done.

+
+  DISALLOW_COPY_AND_ASSIGN(DataReductionProxySettingsAndroid);
+};
+
+#endif  // CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_SETTINGS_ANDROID_H_