Implement PrerenderManager::AddPrerenderForOffline()

chrome/browser/prerender/prerender_histograms.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/browser/prerender/prerender_histograms.h"
 
 #include <string>
 
 #include "base/format_macros.h"
 #include "base/metrics/histogram.h"
@@ skipping 29 matching lines @@
   switch (origin) {
     case ORIGIN_OMNIBOX:
       return ComposeHistogramName("omnibox", name);
     case ORIGIN_NONE:
       return ComposeHistogramName("none", name);
     case ORIGIN_LINK_REL_PRERENDER_SAMEDOMAIN:
       return ComposeHistogramName("websame", name);
     case ORIGIN_LINK_REL_PRERENDER_CROSSDOMAIN:
       return ComposeHistogramName("webcross", name);
     case ORIGIN_EXTERNAL_REQUEST:
-        return ComposeHistogramName("externalrequest", name);
+      return ComposeHistogramName("externalrequest", name);
     case ORIGIN_INSTANT:
       return ComposeHistogramName("Instant", name);
     case ORIGIN_LINK_REL_NEXT:
       return ComposeHistogramName("webnext", name);
     case ORIGIN_GWS_PRERENDER:
       return ComposeHistogramName("gws", name);
     case ORIGIN_EXTERNAL_REQUEST_FORCED_CELLULAR:
       return ComposeHistogramName("externalrequestforced", name);
+    case ORIGIN_OFFLINE:
+      return ComposeHistogramName("offline", name);
     default:
       NOTREACHED();
       break;
   }
 
   // Dummy return value to make the compiler happy.
   NOTREACHED();
   return ComposeHistogramName("wash", name);
 }
 
@@ skipping 15 matching lines @@
 
 #define PREFIXED_HISTOGRAM_INTERNAL(origin, wash, HISTOGRAM, histogram_name) \
 do { \
   { \
     /* Do not rename.  HISTOGRAM expects a local variable "name". */           \
     std::string name = ComposeHistogramName(std::string(), histogram_name);    \
     HISTOGRAM;                                                                 \
   } \
   /* Do not rename.  HISTOGRAM expects a local variable "name". */ \
   std::string name = GetHistogramName(origin, wash, histogram_name); \
+  /* Branching because HISTOGRAM is caching the histogram into a static. */ \
   if (wash) { \
     HISTOGRAM; \
   } else if (origin == ORIGIN_OMNIBOX) { \
     HISTOGRAM; \
   } else if (origin == ORIGIN_NONE) { \
     HISTOGRAM; \
   } else if (origin == ORIGIN_LINK_REL_PRERENDER_SAMEDOMAIN) { \
     HISTOGRAM; \
   } else if (origin == ORIGIN_LINK_REL_PRERENDER_CROSSDOMAIN) { \
     HISTOGRAM; \
   } else if (origin == ORIGIN_EXTERNAL_REQUEST) { \
     HISTOGRAM; \
   } else if (origin == ORIGIN_INSTANT) { \
     HISTOGRAM; \
   } else if (origin == ORIGIN_LINK_REL_NEXT) { \
     HISTOGRAM; \
   } else if (origin == ORIGIN_EXTERNAL_REQUEST_FORCED_CELLULAR) { \
     HISTOGRAM; \
+  } else if (origin == ORIGIN_OFFLINE) { \
+    HISTOGRAM; \
   } else { \
     HISTOGRAM; \
   } \
 } while (0)
 
 PrerenderHistograms::PrerenderHistograms()
     : last_origin_(ORIGIN_MAX),
       origin_wash_(false),
       seen_any_pageload_(true),
       seen_pageload_started_after_prerender_(true) {
@@ skipping 273 matching lines @@
   }
 }
 
 bool PrerenderHistograms::IsOriginWash() const {
   if (!WithinWindow())
     return false;
   return origin_wash_;
 }
 
 }  // namespace prerender