Add the plumbing to enable DRP

android_webview/browser/aw_browser_context.cc

 // Copyright (c) 2012 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.
 
 #include "android_webview/browser/aw_browser_context.h"
 
 #include "android_webview/browser/aw_form_database_service.h"
 #include "android_webview/browser/aw_pref_store.h"
 #include "android_webview/browser/aw_quota_manager_bridge.h"
 #include "android_webview/browser/aw_resource_context.h"
@@ skipping 23 matching lines @@
 namespace {
 
 // Shows notifications which correspond to PersistentPrefStore's reading errors.
 void HandleReadError(PersistentPrefStore::PrefReadError error) {
 }
 
 AwBrowserContext* g_browser_context = NULL;
 
 }  // namespace
 
+// Data reduction proxy is disabled by default.
+bool AwBrowserContext::data_reduction_proxy_enabled_ = false;
+
 AwBrowserContext::AwBrowserContext(
     const FilePath path,
     JniDependencyFactory* native_factory)
     : context_storage_path_(path),
       native_factory_(native_factory) {
   DCHECK(g_browser_context == NULL);
   g_browser_context = this;
 
   // This constructor is entered during the creation of ContentBrowserClient,
   // before browser threads are created. Therefore any checks to enforce
@@ skipping 12 matching lines @@
   return g_browser_context;
 }
 
 // static
 AwBrowserContext* AwBrowserContext::FromWebContents(
     content::WebContents* web_contents) {
   // This is safe; this is the only implementation of the browser context.
   return static_cast<AwBrowserContext*>(web_contents->GetBrowserContext());
 }
 
+// static
+void AwBrowserContext::SetDataReductionProxyEnabled(bool enabled) {
+  // Cache the setting value. It is possible that data reduction proxy is
+  // not created yet.
+  data_reduction_proxy_enabled_ = enabled;
+  AwBrowserContext* context = AwBrowserContext::GetDefault();
+  // Can't enable Data reduction proxy if user pref service is not ready.
+  if (context == NULL || context->user_pref_service_.get() == NULL)
+    return;
+  DataReductionProxySettings* proxy_settings =
+      context->GetDataReductionProxySettings();
+  if (proxy_settings == NULL)
+    return;
+  proxy_settings->SetDataReductionProxyEnabled(data_reduction_proxy_enabled_);
+}
+
 void AwBrowserContext::PreMainMessageLoopRun() {
   cookie_store_ = CreateCookieStore(this);
   DataReductionProxySettings::SetAllowed(true);
   DataReductionProxySettings::SetPromoAllowed(false);
   data_reduction_proxy_settings_.reset(
       new DataReductionProxySettings());
   data_reduction_proxy_settings_->set_fallback_allowed(false);
 
   url_request_context_getter_ =
       new AwURLRequestContextGetter(GetPath(), cookie_store_.get());
@@ skipping 76 matching lines @@
   pref_service_factory.set_read_error_callback(base::Bind(&HandleReadError));
   user_pref_service_ = pref_service_factory.Create(pref_registry).Pass();
 
   user_prefs::UserPrefs::Set(this, user_pref_service_.get());
 
   data_reduction_proxy_settings_->InitDataReductionProxySettings(
       user_pref_service_.get(),
       user_pref_service_.get(),
       GetRequestContext());
 
-  //TODO(sgurun): Attach this to the API. It is currently hard coded in a
-  // disabled state.
-  data_reduction_proxy_settings_->SetDataReductionProxyEnabled(false);
+  data_reduction_proxy_settings_->SetDataReductionProxyEnabled(
+      data_reduction_proxy_enabled_);
 }
 
 base::FilePath AwBrowserContext::GetPath() const {
   return context_storage_path_;
 }
 
 bool AwBrowserContext::IsOffTheRecord() const {
   // Android WebView does not support off the record profile yet.
   return false;
 }
@@ skipping 95 matching lines @@
 
 void AwBrowserContext::RebuildTable(
     const scoped_refptr<URLEnumerator>& enumerator) {
   // Android WebView rebuilds from WebChromeClient.getVisitedHistory. The client
   // can change in the lifetime of this WebView and may not yet be set here.
   // Therefore this initialization path is not used.
   enumerator->OnComplete(true);
 }
 
 }  // namespace android_webview