Move scoped_nsdisable_screen_update from base to app/mac

Move scoped_aedesc from base to base/mac
Use namespace and proper Google-style class naming.

TEST=it compiles
BUG=none
Review URL: http://codereview.chromium.org/3828009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@62904 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 140 insertions, 0 deletions

diff --git a/base/mac/scoped_aedesc.h b/base/mac/scoped_aedesc.h
new file mode 100644
index 0000000..83a38c6
--- /dev/null
+++ b/base/mac/scoped_aedesc.h
@@ -0,0 +1,53 @@
+// Copyright (c) 2010 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 BASE_MAC_SCOPED_AEDESC_H_
+#define BASE_MAC_SCOPED_AEDESC_H_
+#pragma once
+
+#import <CoreServices/CoreServices.h>
+
+#include "base/basictypes.h"
+
+namespace base {
+namespace mac {
+
+// The ScopedAEDesc is used to scope AppleEvent descriptors.  On creation,
+// it will store a NULL descriptor.  On destruction, it will dispose of the
+// descriptor.
+//
+// This class is parameterized for additional type safety checks.  You can use
+// the generic AEDesc type by not providing a template parameter:
+//  ScopedAEDesc<> desc;
+template <typename AEDescType = AEDesc>
+class ScopedAEDesc {
+ public:
+  ScopedAEDesc() {
+    AECreateDesc(typeNull, NULL, 0, &desc_);
+  }
+
+  ~ScopedAEDesc() {
+    AEDisposeDesc(&desc_);
+  }
+
+  // Used for in parameters.
+  operator const AEDescType*() {
+    return &desc_;
+  }
+
+  // Used for out parameters.
+  AEDescType* OutPointer() {
+    return &desc_;
+  }
+
+ private:
+  AEDescType desc_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedAEDesc);
+};
+
+}  // namespace mac
+}  // namespace base
+
+#endif  // BASE_MAC_SCOPED_AEDESC_H_
diff --git a/base/mac/scoped_nsautorelease_pool.h b/base/mac/scoped_nsautorelease_pool.h
new file mode 100644
index 0000000..0a95bd1b
--- /dev/null
+++ b/base/mac/scoped_nsautorelease_pool.h
@@ -0,0 +1,55 @@
+// Copyright (c) 2010 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 BASE_MAC_SCOPED_NSAUTORELEASE_POOL_H_
+#define BASE_MAC_SCOPED_NSAUTORELEASE_POOL_H_
+#pragma once
+
+#include "base/basictypes.h"
+
+#if defined(OS_MACOSX)
+#if defined(__OBJC__)
+@class NSAutoreleasePool;
+#else  // __OBJC__
+class NSAutoreleasePool;
+#endif  // __OBJC__
+#endif  // OS_MACOSX
+
+namespace base {
+namespace mac {
+
+// On the Mac, ScopedNSAutoreleasePool allocates an NSAutoreleasePool when
+// instantiated and sends it a -drain message when destroyed.  This allows an
+// autorelease pool to be maintained in ordinary C++ code without bringing in
+// any direct Objective-C dependency.
+//
+// On other platforms, ScopedNSAutoreleasePool is an empty object with no
+// effects.  This allows it to be used directly in cross-platform code without
+// ugly #ifdefs.
+class ScopedNSAutoreleasePool {
+ public:
+#if !defined(OS_MACOSX)
+  ScopedNSAutoreleasePool() {}
+  void Recycle() { }
+#else  // OS_MACOSX
+  ScopedNSAutoreleasePool();
+  ~ScopedNSAutoreleasePool();
+
+  // Clear out the pool in case its position on the stack causes it to be
+  // alive for long periods of time (such as the entire length of the app).
+  // Only use then when you're certain the items currently in the pool are
+  // no longer needed.
+  void Recycle();
+ private:
+  NSAutoreleasePool* autorelease_pool_;
+#endif  // OS_MACOSX
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScopedNSAutoreleasePool);
+};
+
+}  // namespace mac
+}  // namespace base
+
+#endif  // BASE_MAC_SCOPED_NSAUTORELEASE_POOL_H_
diff --git a/base/mac/scoped_nsautorelease_pool.mm b/base/mac/scoped_nsautorelease_pool.mm
new file mode 100644
index 0000000..e542ca8
--- /dev/null
+++ b/base/mac/scoped_nsautorelease_pool.mm
@@ -0,0 +1,32 @@
+// Copyright (c) 2010 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 "base/mac/scoped_nsautorelease_pool.h"
+
+#import <Foundation/Foundation.h>
+
+#include "base/logging.h"
+
+namespace base {
+namespace mac {
+
+ScopedNSAutoreleasePool::ScopedNSAutoreleasePool()
+    : autorelease_pool_([[NSAutoreleasePool alloc] init]) {
+  DCHECK(autorelease_pool_);
+}
+
+ScopedNSAutoreleasePool::~ScopedNSAutoreleasePool() {
+  [autorelease_pool_ drain];
+}
+
+// Cycle the internal pool, allowing everything there to get cleaned up and
+// start anew.
+void ScopedNSAutoreleasePool::Recycle() {
+  [autorelease_pool_ drain];
+  autorelease_pool_ = [[NSAutoreleasePool alloc] init];
+  DCHECK(autorelease_pool_);
+}
+
+}  // namespace mac
+}  // namespace base