Added probe to determine if data reduction proxy can be used

chrome/common/chrome_switches.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 "chrome/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 224 matching lines @@
 const char kCrashOnHangThreads[]            = "crash-on-hang-threads";
 
 // Some platforms like ChromeOS default to empty desktop.
 // Browser tests may need to add this switch so that at least one browser
 // instance is created on startup.
 // TODO(nkostylev): Investigate if this switch could be removed.
 // (http://crbug.com/148675)
 const char kCreateBrowserOnStartupForTests[] =
     "create-browser-on-startup-for-tests";
 
+#if defined(OS_ANDROID) || defined(OS_IOS)
+// If set, the data reduction proxy will only be enabled if a request for this
+// URL is successful.
+const char kDataReductionProxyProbeURL[]    = "data-reduction-proxy-probe-url";
+#endif
+
 // Enables a frame context menu item that toggles the frame in and out of glass
 // mode (Windows Vista and up only).
 const char kDebugEnableFrameToggle[]        = "debug-enable-frame-toggle";
 
 // Adds debugging entries such as Inspect Element to context menus of packed
 // apps.
 const char kDebugPackedApps[]               = "debug-packed-apps";
 
 // Enables support to debug printing subsystem.
 const char kDebugPrint[]                    = "debug-print";
@@ skipping 1056 matching lines @@
 
 // Simulates that current version is outdated.
 const char kSimulateOutdated[]               = "simulate-outdated";
 
 // Replaces the buffered data source for <audio> and <video> with a simplified
 // resource loader that downloads the entire resource into memory.
 
 // Origin for which SpdyProxy authentication is supported.
 const char kSpdyProxyAuthOrigin[]           = "spdy-proxy-auth-origin";
 
+// Authentication string for the data reduction proxy.
+const char kSpdyProxyAuthValue[]            = "spdy-proxy-auth-value";
+
 // Speculative resource prefetching.
 const char kSpeculativeResourcePrefetching[] =
     "speculative-resource-prefetching";
 
 // Speculative resource prefetching is disabled.
 const char kSpeculativeResourcePrefetchingDisabled[] = "disabled";
 
 // Speculative resource prefetching will only learn about resources that need to
 // be prefetched but will not prefetch them.
 const char kSpeculativeResourcePrefetchingLearning[] = "learning";
@@ skipping 310 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead, please
 // put them in alphabetical order above, or in order inside the appropriate
 // ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches