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1 /* | 1 /* |
2 * Copyright (C) 2012 Google, Inc. All rights reserved. | 2 * Copyright (C) 2012 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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34 #include "wtf/text/WTFString.h" | 34 #include "wtf/text/WTFString.h" |
35 #include <v8.h> | 35 #include <v8.h> |
36 | 36 |
37 namespace blink { | 37 namespace blink { |
38 | 38 |
39 class CSSStyleSheet; | 39 class CSSStyleSheet; |
40 class Document; | 40 class Document; |
41 class EnumerationHistogram; | 41 class EnumerationHistogram; |
42 class ExecutionContext; | 42 class ExecutionContext; |
43 class Frame; | 43 class Frame; |
44 class LocalFrame; | |
45 class StyleSheetContents; | 44 class StyleSheetContents; |
46 | 45 |
47 // UseCounter is used for counting the number of times features of | 46 // UseCounter is used for counting the number of times features of |
48 // Blink are used on real web pages and help us know commonly | 47 // Blink are used on real web pages and help us know commonly |
49 // features are used and thus when it's safe to remove or change them. | 48 // features are used and thus when it's safe to remove or change them. |
50 // | 49 // |
51 // The Chromium Content layer controls what is done with this data. | 50 // The Chromium Content layer controls what is done with this data. |
52 // | 51 // |
53 // For instance, in Google Chrome, these counts are submitted anonymously | 52 // For instance, in Google Chrome, these counts are submitted anonymously |
54 // through the UMA histogram recording system in Chrome for users who have the | 53 // through the UMA histogram recording system in Chrome for users who have the |
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1469 // Tracks what features/properties need to be reported to the legacy | 1468 // Tracks what features/properties need to be reported to the legacy |
1470 // histograms. | 1469 // histograms. |
1471 BitVector m_featureBits; | 1470 BitVector m_featureBits; |
1472 BitVector m_CSSBits; | 1471 BitVector m_CSSBits; |
1473 } m_legacyCounter; | 1472 } m_legacyCounter; |
1474 }; | 1473 }; |
1475 | 1474 |
1476 } // namespace blink | 1475 } // namespace blink |
1477 | 1476 |
1478 #endif // UseCounter_h | 1477 #endif // UseCounter_h |
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