Watch the Internet Explorer registry keys so we can detect proxy settings changes faster.

Previously we would poll on a background thread every 5 seconds (triggered by network activity) to check for changes. This meant there was a 5 second window during which new requests might still be using the old settings.

With this CL, the settings are noticed almost immediately and the continuous polling is de-emphasized.

(We still poll, but less often. This is a precaution since we are relying on implementation details of a winhttp function, and can't be sure it won't change in the future, or is even completely accurate right now).

BUG=52120
TEST=Open chrome://net-internals/#requests. Request some webpage. Now make changes to the Internet explorer proxy settinsg. You should see a PROXY_CONFIG_CHANGED event emitted immediately after saving each change in the dialog box.

Review URL: http://codereview.chromium.org/3161016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@56305 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 3 insertions, 0 deletions

diff --git a/net/proxy/polling_proxy_config_service.h b/net/proxy/polling_proxy_config_service.h
index 455359a..b4295ec 100644
--- a/net/proxy/polling_proxy_config_service.h
+++ b/net/proxy/polling_proxy_config_service.h
@@ -40,6 +40,9 @@ class PollingProxyConfigService : public ProxyConfigService {
 
   virtual ~PollingProxyConfigService();
 
+  // Polls for changes by posting a task to the worker pool.
+  void CheckForChangesNow();
+
  private:
   class Core;
   scoped_refptr<Core> core_;