| Index: third_party/WebKit/Source/core/html/track/vtt/VTTScanner.cpp | 
| diff --git a/third_party/WebKit/Source/core/html/track/vtt/VTTScanner.cpp b/third_party/WebKit/Source/core/html/track/vtt/VTTScanner.cpp | 
| index 423dce5c6df003f0b5be03b36184b9a6590d284d..22bd7765988405c9ae3d6d099d1d47abe77dae58 100644 | 
| --- a/third_party/WebKit/Source/core/html/track/vtt/VTTScanner.cpp | 
| +++ b/third_party/WebKit/Source/core/html/track/vtt/VTTScanner.cpp | 
| @@ -67,10 +67,10 @@ bool VTTScanner::scan(const LChar* characters, size_t charactersCount) | 
|  | 
| bool VTTScanner::scanRun(const Run& run, const String& toMatch) | 
| { | 
| -    ASSERT(run.start() == getPosition()); | 
| -    ASSERT(run.start() <= end()); | 
| -    ASSERT(run.end() >= run.start()); | 
| -    ASSERT(run.end() <= end()); | 
| +    DCHECK_EQ(run.start(), getPosition()); | 
| +    DCHECK_LE(run.start(), end()); | 
| +    DCHECK_GE(run.end(), run.start()); | 
| +    DCHECK_LE(run.end(), end()); | 
| size_t matchLength = run.length(); | 
| if (toMatch.length() > matchLength) | 
| return false; | 
| @@ -86,18 +86,18 @@ bool VTTScanner::scanRun(const Run& run, const String& toMatch) | 
|  | 
| void VTTScanner::skipRun(const Run& run) | 
| { | 
| -    ASSERT(run.start() <= end()); | 
| -    ASSERT(run.end() >= run.start()); | 
| -    ASSERT(run.end() <= end()); | 
| +    DCHECK_LE(run.start(), end()); | 
| +    DCHECK_GE(run.end(), run.start()); | 
| +    DCHECK_LE(run.end(), end()); | 
| seekTo(run.end()); | 
| } | 
|  | 
| String VTTScanner::extractString(const Run& run) | 
| { | 
| -    ASSERT(run.start() == getPosition()); | 
| -    ASSERT(run.start() <= end()); | 
| -    ASSERT(run.end() >= run.start()); | 
| -    ASSERT(run.end() <= end()); | 
| +    DCHECK_EQ(run.start(), getPosition()); | 
| +    DCHECK_LE(run.start(), end()); | 
| +    DCHECK_GE(run.end(), run.start()); | 
| +    DCHECK_LE(run.end(), end()); | 
| String s; | 
| if (m_is8Bit) | 
| s = String(m_data.characters8, run.length()); | 
|  |