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* Add IPv6 probing support, and disable IPv6 resolution when it is useless jar@chromium.org2010-02-081-2/+19
| | | | | | | | | | | | | | | | | | | I've added minimal probing to check if IPv6 is at all possible, and when it is not, then we disable IPv6 resolution. I've also added histograms and A/B test support to evaluate the impact of this change. (I landed originally, but had tree problems, and this is a new CL to tryto reland). Note that I've switched back to MACRO style enums as well, per http://dev.chromium.org/developers/coding-style (search for "enum"). This version now does the conditional testing at a higher level (in io_thread.h), so that it should interfere less with other testing. r=wtc,eroman Review URL: http://codereview.chromium.org/585005 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@38402 0039d316-1c4b-4281-b951-d872f2087c98
* Revert 38307 - Test to see if IPv6 can be disabled: Will roll back ASAPjar@chromium.org2010-02-061-1/+1
| | | | | | | | | | | | | This tests to see what happens if the command line option disables IPv6. I will roll back as soon as the builders start. TBR=eroman Review URL: http://codereview.chromium.org/579022 TBR=jar@chromium.org Review URL: http://codereview.chromium.org/579023 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@38308 0039d316-1c4b-4281-b951-d872f2087c98
* Test to see if IPv6 can be disabled: Will roll back ASAPjar@chromium.org2010-02-061-1/+1
| | | | | | | | | | This tests to see what happens if the command line option disables IPv6. I will roll back as soon as the builders start. TBR=eroman Review URL: http://codereview.chromium.org/579022 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@38307 0039d316-1c4b-4281-b951-d872f2087c98
* Remove the HostResolver::Shutdown() method.eroman@chromium.org2010-02-051-2/+5
| | | | | | | | | | | While this doesn't entirely remove the hack, it limits the scope of it to HostResolverImpl. Hopefully in the future HostResolver will not be refcounted so this can go away altogether. BUG=18373 Review URL: http://codereview.chromium.org/569035 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@38243 0039d316-1c4b-4281-b951-d872f2087c98
* Revert 38085 - A brief test of whether we can safely disable ipv6. Will ↵jar@chromium.org2010-02-041-1/+1
| | | | | | | | | | | | | | | | | rollback asap. Having had trouble with a probe based disabling of ipv6, I wanted to understand if globally disabling IPv6 is problematic. I'll rollback this chance as soon as the buildbots begin to test it. tbr=wtc Review URL: http://codereview.chromium.org/573004 TBR=jar@chromium.org Review URL: http://codereview.chromium.org/561070 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@38086 0039d316-1c4b-4281-b951-d872f2087c98
* A brief test of whether we can safely disable ipv6. Will rollback asap.jar@chromium.org2010-02-041-1/+1
| | | | | | | | | | | | Having had trouble with a probe based disabling of ipv6, I wanted to understand if globally disabling IPv6 is problematic. I'll roll-back this chance as soon as the build-bots begin to test it. tbr=wtc Review URL: http://codereview.chromium.org/573004 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@38085 0039d316-1c4b-4281-b951-d872f2087c98
* Pass the NetworkChangeNotifier to HostResolver.willchan@chromium.org2010-02-041-18/+24
| | | | | | | | | | | | | | | This requires the following refactors: (1) NetworkChangeNotifier moves out of HttpNetworkSession into IOThread. (2) HostResolver gets initialized with NetworkChangeNotifier. (3) NetworkChangeNotifier needs to get passed into HttpCache and HttpNetworkSession (required updating a lot of files). (4) NetworkChangeNotifier is no longer reference counted. It is owned by IOThread. (5) IOThread gains a new struct: Globals. It can only be used on the io thread. (6) ChromeURLRequestContextFactory uses IOThread::Globals to initialize ChromeURLRequest objects with the host resolver and network change notifier. BUG=26159 Review URL: http://codereview.chromium.org/552117 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@38052 0039d316-1c4b-4281-b951-d872f2087c98
* Add fine grain tracing to HostResolverImpl.eroman@chromium.org2010-02-021-3/+7
| | | | | | | | | | | | | This will help in diagnosing the "slow resolving host" bugs. Users can now click an "Enable tracing" button on "chrome://net-internals/hostresolver". This logs detailed information on the DNS requests flowing through the browser (when they were received, when they were posted to the thread pool, when they started running on the worker thread, etc...). BUG=12754 Review URL: http://codereview.chromium.org/556094 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@37776 0039d316-1c4b-4281-b951-d872f2087c98
* Pull IOThread out of BrowserProcessImpl. Move the dns prefetching ↵willchan@chromium.org2010-01-221-0/+183
initialization into IOThread. The global host resolver and dns master have changed to be member variables of IOThread. BUG=26156,26159 Review URL: http://codereview.chromium.org/553026 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@36866 0039d316-1c4b-4281-b951-d872f2087c98
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