Wire up OOM exception to the sad tab page.

chrome/browser/ui/views/sad_tab_view.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/ui/views/sad_tab_view.h"
 
 #include <string>
 
 #include "base/metrics/histogram.h"
 #include "build/build_config.h"
@@ skipping 94 matching lines @@
       UMA_HISTOGRAM_CUSTOM_COUNTS(
           "Tabs.SadTab.CrashCreated", crashed, 1, 1000, 50);
       break;
     }
     case chrome::SAD_TAB_KIND_KILLED: {
       RecordKillCreated();
       LOG(WARNING) << "Tab Killed: "
                    <<  web_contents->GetURL().GetOrigin().spec();
       break;
     }
+    case chrome::SAD_TAB_KIND_OOM: {
+      static int crashed_due_to_oom = 0;
+      crashed_due_to_oom++;
+      UMA_HISTOGRAM_CUSTOM_COUNTS(

[Alexei Svitkine (slow), 2016/07/25 20:39:00]

This is UMA_HISTOGRAM_COUNTS_1000().

[Will Harris, 2016/07/25 20:47:53]

Done.

+          "Tabs.SadTab.OomCreated", crashed_due_to_oom, 1, 1000, 50);
+      break;
+    }
 #if defined(OS_CHROMEOS)
     case chrome::SAD_TAB_KIND_KILLED_BY_OOM: {
       RecordKillCreated();
       RecordKillCreatedOOM();
       const std::string spec = web_contents->GetURL().GetOrigin().spec();
       memory::OomMemoryDetails::Log(
           "Tab OOM-Killed Memory details: " + spec + ", ", base::Closure());
       break;
     }
 #endif
@@ skipping 34 matching lines @@
   layout->AddView(title_, 2, 1);
 
   const SkColor text_color = GetNativeTheme()->GetSystemColor(
       ui::NativeTheme::kColorId_LabelDisabledColor);
 
   int message_id = IDS_SAD_TAB_MESSAGE;
 #if defined(OS_CHROMEOS)
   if (kind_ == chrome::SAD_TAB_KIND_KILLED_BY_OOM)
     message_id = IDS_KILLED_TAB_BY_OOM_MESSAGE;
 #endif
+  if (kind_ == chrome::SAD_TAB_KIND_OOM)
+    message_id = IDS_SAD_TAB_OOM_MESSAGE;
 
   message_ = CreateLabel(l10n_util::GetStringUTF16(message_id));
 
   message_->SetMultiLine(true);
   message_->SetEnabledColor(text_color);
   message_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   message_->SetLineHeight(views::kPanelSubVerticalSpacing);
 
   layout->StartRowWithPadding(0, column_set_id, 0, views::kPanelVertMargin);
   layout->AddView(message_, 2, 1, views::GridLayout::LEADING,
@@ skipping 66 matching lines @@
     // These stats should use the same counting approach and bucket size used
     // for tab discard events in memory::OomPriorityManager so they can be
     // directly compared.
     switch (kind_) {
       case chrome::SAD_TAB_KIND_CRASHED: {
         static int crashed = 0;
         UMA_HISTOGRAM_CUSTOM_COUNTS(
             "Tabs.SadTab.CrashDisplayed", ++crashed, 1, 1000, 50);
         break;
       }
+      case chrome::SAD_TAB_KIND_OOM: {
+        static int crashed_due_to_oom = 0;
+        UMA_HISTOGRAM_CUSTOM_COUNTS(
+            "Tabs.SadTab.OomDisplayed", ++crashed_due_to_oom, 1, 1000, 50);
+        break;
+      }
       case chrome::SAD_TAB_KIND_KILLED:
         RecordKillDisplayed();
         break;
 #if defined(OS_CHROMEOS)
       case chrome::SAD_TAB_KIND_KILLED_BY_OOM:
         RecordKillDisplayed();
         RecordKillDisplayedOOM();
         break;
 #endif
     }
@@ skipping 44 matching lines @@
 }
 
 namespace chrome {
 
 SadTab* SadTab::Create(content::WebContents* web_contents,
                        SadTabKind kind) {
   return new SadTabView(web_contents, kind);
 }
 
 }  // namespace chrome