Render/pepper hang debugging: generate dumps for the browser and renderer processes if users kill a hung pepper plugin.

This CL collects information in order to diagnose inter-process pepper deadlocks.
- We don't crash those renderers or the browser.
- We only do this on the Windows Canary channel for 20% of pepper plugin hangs, if there are not too many renderers (<4).

BUG=147593
TEST=None


Review URL: https://chromiumcodereview.appspot.com/10983028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@158717 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 0 insertions, 97 deletions

diff --git a/ppapi/shared_impl/ppapi_message_tracker.cc b/ppapi/shared_impl/ppapi_message_tracker.cc
deleted file mode 100644
index 4fba69f..0000000
--- a/ppapi/shared_impl/ppapi_message_tracker.cc
+++ /dev/null
@@ -1,47 +0,0 @@
-// 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 "ppapi/shared_impl/ppapi_message_tracker.h"
-
-#include "base/logging.h"
-#include "base/memory/singleton.h"
-
-namespace ppapi {
-
-//static
-PpapiMessageTracker* PpapiMessageTracker::GetInstance() {
-  return Singleton<PpapiMessageTracker>::get();
-}
-
-PpapiMessageTracker::PpapiMessageTracker() : enter_count_(0) {
-}
-
-PpapiMessageTracker::~PpapiMessageTracker() {
-}
-
-void PpapiMessageTracker::EnterMessageHandling() {
-  base::AutoLock auto_lock(lock_);
-  enter_count_++;
-}
-
-void PpapiMessageTracker::ExitMessageHandling() {
-  base::AutoLock auto_lock(lock_);
-  DCHECK_GT(enter_count_, 0);
-  enter_count_--;
-}
-
-bool PpapiMessageTracker::IsHandlingMessage() {
-  base::AutoLock auto_lock(lock_);
-  return enter_count_ > 0;
-}
-
-ScopedTrackPpapiMessage::ScopedTrackPpapiMessage() {
-  PpapiMessageTracker::GetInstance()->EnterMessageHandling();
-}
-
-ScopedTrackPpapiMessage::~ScopedTrackPpapiMessage() {
-  PpapiMessageTracker::GetInstance()->ExitMessageHandling();
-}
-
-}  // namespace ppapi
diff --git a/ppapi/shared_impl/ppapi_message_tracker.h b/ppapi/shared_impl/ppapi_message_tracker.h
deleted file mode 100644
index d817b97..0000000
--- a/ppapi/shared_impl/ppapi_message_tracker.h
+++ /dev/null
@@ -1,50 +0,0 @@
-// 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.
-
-#ifndef PPAPI_SHARED_IMPL_PPAPI_MESSAGE_TRACKER_H_
-#define PPAPI_SHARED_IMPL_PPAPI_MESSAGE_TRACKER_H_
-
-#include "base/basictypes.h"
-#include "base/synchronization/lock.h"
-#include "ppapi/shared_impl/ppapi_shared_export.h"
-
-template <typename T> struct DefaultSingletonTraits;
-
-namespace ppapi {
-
-// PpapiMessageTracker uses a counter to record whether anyone is sending or
-// receiving pepper messages in the current process.
-// This class is thread safe.
-class PPAPI_SHARED_EXPORT PpapiMessageTracker {
- public:
-  static PpapiMessageTracker* GetInstance();
-
-  void EnterMessageHandling();
-  void ExitMessageHandling();
-  bool IsHandlingMessage();
-
- private:
-  friend struct DefaultSingletonTraits<PpapiMessageTracker>;
-
-  PpapiMessageTracker();
-  ~PpapiMessageTracker();
-
-  base::Lock lock_;
-  int enter_count_;
-
-  DISALLOW_COPY_AND_ASSIGN(PpapiMessageTracker);
-};
-
-class PPAPI_SHARED_EXPORT ScopedTrackPpapiMessage {
- public:
-  ScopedTrackPpapiMessage();
-  ~ScopedTrackPpapiMessage();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ScopedTrackPpapiMessage);
-};
-
-}  // namespace ppapi
-
-#endif  // PPAPI_SHARED_IMPL_PPAPI_MESSAGE_TRACKER_H_