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1 /* | 1 /* |
2 * Copyright (C) 2011 Google, Inc. All Rights Reserved. | 2 * Copyright (C) 2011 Google, Inc. All Rights Reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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29 #include "platform/heap/Handle.h" | 29 #include "platform/heap/Handle.h" |
30 | 30 |
31 namespace blink { | 31 namespace blink { |
32 | 32 |
33 class LocalFrame; | 33 class LocalFrame; |
34 | 34 |
35 class FrameDestructionObserver : public WillBeGarbageCollectedMixin { | 35 class FrameDestructionObserver : public WillBeGarbageCollectedMixin { |
36 public: | 36 public: |
37 explicit FrameDestructionObserver(LocalFrame*); | 37 explicit FrameDestructionObserver(LocalFrame*); |
38 | 38 |
| 39 #if !ENABLE(OILPAN) |
| 40 // Oilpan: there is no known need for directly observing |
| 41 // frameDestroyed() with Oilpan enabled, as its clearing is |
| 42 // handled by keeping a weak reference. |
| 43 // |
| 44 // A weak callback version of frameDestroyed() can be reintroduced |
| 45 // later, should the need arise. |
39 virtual void frameDestroyed(); | 46 virtual void frameDestroyed(); |
| 47 #endif |
40 virtual void willDetachFrameHost(); | 48 virtual void willDetachFrameHost(); |
41 | 49 |
42 LocalFrame* frame() const { return m_frame; } | 50 LocalFrame* frame() const { return m_frame; } |
43 | 51 |
44 virtual void trace(Visitor*); | 52 virtual void trace(Visitor*); |
45 | 53 |
46 protected: | 54 protected: |
47 #if !ENABLE(OILPAN) | 55 #if !ENABLE(OILPAN) |
48 virtual ~FrameDestructionObserver(); | 56 virtual ~FrameDestructionObserver(); |
49 #endif | 57 #endif |
50 | 58 |
51 void observeFrame(LocalFrame*); | 59 void observeFrame(LocalFrame*); |
52 | 60 |
53 RawPtrWillBeWeakMember<LocalFrame> m_frame; | 61 RawPtrWillBeWeakMember<LocalFrame> m_frame; |
54 }; | 62 }; |
55 | 63 |
56 } | 64 } |
57 | 65 |
58 #endif | 66 #endif |
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