This change enables FieldTrial for SPDY. When --use-spdy=npn is used, field test won't be enabled.

However, when that flag is missing, A/B test is added to browser_main.cc. Trial A: use npn and spdy. B: use npn but no spdy. C: do nothing. A and B are set to zero for now
The histograms we collect are: 
1. Page begin to finish time when spdy is enabled/disabled across all sites;
2. Page begin to finish time when spdy is used on sites that support spdy and when spdy is intentionally ignored. 


BUG=43997
TEST=Don't use --use-spdy=npn, manually change _npn_nospdy and _npn_withspdy percentile and go to spdy supported sites.

Review URL: http://codereview.chromium.org/2036012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@47896 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 6 insertions, 0 deletions

diff --git a/chrome/renderer/navigation_state.h b/chrome/renderer/navigation_state.h
index 36a8441..8d762aa 100644
--- a/chrome/renderer/navigation_state.h
+++ b/chrome/renderer/navigation_state.h
@@ -220,6 +220,9 @@ class NavigationState : public WebKit::WebDataSource::ExtraData {
   void set_was_fetched_via_spdy(bool value) { was_fetched_via_spdy_ = value; }
   bool was_fetched_via_spdy() const { return was_fetched_via_spdy_; }
 
+  void set_was_npn_negotiated(bool value) { was_npn_negotiated_ = value; }
+  bool was_npn_negotiated() const { return was_npn_negotiated_; }
+
   // Whether the frame text contents was translated to a different language.
   void set_was_translated(bool value) { was_translated_ = value; }
   bool was_translated() const { return was_translated_; }
@@ -243,6 +246,7 @@ class NavigationState : public WebKit::WebDataSource::ExtraData {
         cache_policy_override_(WebKit::WebURLRequest::UseProtocolCachePolicy),
         user_script_idle_scheduler_(NULL),
         was_fetched_via_spdy_(false),
+        was_npn_negotiated_(false),
         was_translated_(false) {
   }
 
@@ -275,6 +279,8 @@ class NavigationState : public WebKit::WebDataSource::ExtraData {
 
   bool was_fetched_via_spdy_;
 
+  bool was_npn_negotiated_;
+
   bool was_translated_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationState);