Add stats to distinguish android renderer crashes.

components/crash/content/browser/crash_dump_manager_android.cc

Index: components/crash/content/browser/crash_dump_manager_android.cc
diff --git a/components/crash/content/browser/crash_dump_manager_android.cc b/components/crash/content/browser/crash_dump_manager_android.cc
index 62e77ad6206c83c83177a64c9d00c3ecc84ff122..cdf67113f92f001b8efb79ffc1ba130cea53ad64 100644
--- a/components/crash/content/browser/crash_dump_manager_android.cc
+++ b/components/crash/content/browser/crash_dump_manager_android.cc
@@ -4,10 +4,12 @@
 
 #include "components/crash/content/browser/crash_dump_manager_android.h"
 
+#include "base/android/application_status_listener.h"
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/posix/global_descriptors.h"
 #include "base/process/process.h"
 #include "base/rand_util.h"
@@ -82,7 +84,8 @@ base::File CrashDumpManager::CreateMinidumpFile(int child_process_id) {
 
 // static
 void CrashDumpManager::ProcessMinidump(const base::FilePath& minidump_path,
-                                       base::ProcessHandle pid) {
+                                       base::ProcessHandle pid,
+                                       bool recordExitStatus) {
   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
   CHECK(instance_);
   int64 file_size = 0;
@@ -90,6 +93,18 @@ void CrashDumpManager::ProcessMinidump(const base::FilePath& minidump_path,
   DCHECK(r) << "Failed to retrieve size for minidump "
             << minidump_path.value();
 
+  if (recordExitStatus) {

[no sievers, 2015/11/17 22:28:53]

nit: style here and elsewhere in C++ code - |record_exit_status| etc.

[Peter Wen, 2015/11/18 22:00:53]

Done.

+    int exitStatus = ExitStatus::COUNT;

[no sievers, 2015/11/17 22:28:53]

nit: no need to init since it's if-else.

[Peter Wen, 2015/11/18 22:00:53]

Done.

+    if (file_size == 0) {
+      exitStatus = ExitStatus::EMPTY_MINIDUMP;
+    } else {
+      exitStatus = ExitStatus::VALID_MINIDUMP;
+    }
+    UMA_HISTOGRAM_ENUMERATION("Tab.RendererDetailedExitStatus",

[no sievers, 2015/11/17 22:28:53]

nit: since this is also called for other process types (utility, gpu), can you
also pass the |ProcessType| (process_type.h) in here? And then maybe
DCHECK_IMPLIES(recordExitStatus, process_type == PROCESS_TYPE_RENDERER) or
something like that.

[Peter Wen, 2015/11/18 22:00:53]

Done.

+                              exitStatus,
+                              ExitStatus::COUNT);
+  }
+
   if (file_size == 0) {
     // Empty minidump, this process did not crash. Just remove the file.
     r = base::DeleteFile(minidump_path, false);
@@ -122,13 +137,13 @@ void CrashDumpManager::ProcessMinidump(const base::FilePath& minidump_path,
 
 void CrashDumpManager::BrowserChildProcessHostDisconnected(
     const content::ChildProcessData& data) {
-  OnChildExit(data.id, data.handle);
+  OnChildExit(data.id, data.handle, /* recordExitStatus */ false);
 }
 
 void CrashDumpManager::BrowserChildProcessCrashed(
     const content::ChildProcessData& data,
     int exit_code) {
-  OnChildExit(data.id, data.handle);
+  OnChildExit(data.id, data.handle, /* recordExitStatus */ false);
 }
 
 void CrashDumpManager::Observe(int type,
@@ -142,7 +157,17 @@ void CrashDumpManager::Observe(int type,
     case content::NOTIFICATION_RENDERER_PROCESS_CLOSED: {
       content::RenderProcessHost* rph =
           content::Source<content::RenderProcessHost>(source).ptr();
-      OnChildExit(rph->GetID(), rph->GetHandle());
+      content::RenderProcessHost::RendererClosedDetails* process_details =
+          content::Details<content::RenderProcessHost::RendererClosedDetails>(
+              details).ptr();
+      bool recordExitStatus = false;
+      // Only record OOM protected renderers that die while the app is in the
+      // foreground. This matches with conditions in TabWebContentsObserver.
+      if (process_details->status == base::TERMINATION_STATUS_OOM_PROTECTED &&
+          base::android::ApplicationStatusListener::HasVisibleActivities()) {
+        recordExitStatus = true;
+      }
+      OnChildExit(rph->GetID(), rph->GetHandle(), recordExitStatus);
       break;
     }
     default:
@@ -152,7 +177,8 @@ void CrashDumpManager::Observe(int type,
 }
 
 void CrashDumpManager::OnChildExit(int child_process_id,
-                                   base::ProcessHandle pid) {
+                                   base::ProcessHandle pid,
+                                   bool recordExitStatus) {
   base::FilePath minidump_path;
   {
     base::AutoLock auto_lock(child_process_id_to_minidump_path_lock_);
@@ -168,7 +194,10 @@ void CrashDumpManager::OnChildExit(int child_process_id,
   }
   BrowserThread::PostTask(
       BrowserThread::FILE, FROM_HERE,
-      base::Bind(&CrashDumpManager::ProcessMinidump, minidump_path, pid));
+      base::Bind(&CrashDumpManager::ProcessMinidump,
+                 minidump_path,
+                 pid,
+                 recordExitStatus));
 }
 
 }  // namespace breakpad