| Index: third_party/WebKit/Source/core/inspector/InspectorStyleSheet.cpp
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| diff --git a/third_party/WebKit/Source/core/inspector/InspectorStyleSheet.cpp b/third_party/WebKit/Source/core/inspector/InspectorStyleSheet.cpp
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| index 7731f8d3339b5e8dc6802570eef0ba6bd655d5b7..31678dbd0d5b82d4794fde98a96292d69c379a52 100644
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| --- a/third_party/WebKit/Source/core/inspector/InspectorStyleSheet.cpp
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| +++ b/third_party/WebKit/Source/core/inspector/InspectorStyleSheet.cpp
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| @@ -262,20 +262,20 @@ void StyleSheetHandler::ObserveProperty(unsigned start_offset,
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|        !current_rule_data_stack_.back()->HasProperties())
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|      return;
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|  
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| -  ASSERT(end_offset <= parsed_text_.length());
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| +  DCHECK_LE(end_offset, parsed_text_.length());
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|    if (end_offset < parsed_text_.length() &&
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|        parsed_text_[end_offset] ==
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|            ';')  // Include semicolon into the property text.
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|      ++end_offset;
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|  
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| -  ASSERT(start_offset < end_offset);
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| +  DCHECK_LT(start_offset, end_offset);
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|    String property_string =
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|        parsed_text_.Substring(start_offset, end_offset - start_offset)
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|            .StripWhiteSpace();
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|    if (property_string.EndsWith(';'))
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|      property_string = property_string.Left(property_string.length() - 1);
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|    size_t colon_index = property_string.find(':');
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| -  ASSERT(colon_index != kNotFound);
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| +  DCHECK_NE(colon_index, kNotFound);
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|  
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|    String name = property_string.Left(colon_index).StripWhiteSpace();
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|    String value =
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| @@ -288,7 +288,7 @@ void StyleSheetHandler::ObserveProperty(unsigned start_offset,
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|  
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|  void StyleSheetHandler::ObserveComment(unsigned start_offset,
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|                                         unsigned end_offset) {
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| -  ASSERT(end_offset <= parsed_text_.length());
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| +  DCHECK_LE(end_offset, parsed_text_.length());
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|  
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|    if (current_rule_data_stack_.IsEmpty() ||
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|        !current_rule_data_stack_.back()->rule_header_range.end ||
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| @@ -760,9 +760,9 @@ bool InspectorStyle::TextForRange(const SourceRange& range, String* result) {
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|    if (!success)
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|      return false;
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|  
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| -  ASSERT(0 <= range.start);
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| -  ASSERT(range.start <= range.end);
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| -  ASSERT(range.end <= style_sheet_text.length());
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| +  DCHECK(0 <= range.start);
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| +  DCHECK_LE(range.start, range.end);
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| +  DCHECK_LE(range.end, style_sheet_text.length());
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|    *result = style_sheet_text.Substring(range.start, range.end - range.start);
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|    return true;
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|  }
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| @@ -1340,13 +1340,13 @@ bool InspectorStyleSheet::DeleteRule(const SourceRange& range,
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|      while (index < parent_media_rule->length() &&
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|             parent_media_rule->Item(index) != rule)
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|        ++index;
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| -    ASSERT(index < parent_media_rule->length());
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| +    DCHECK_LT(index, parent_media_rule->length());
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|      parent_media_rule->deleteRule(index, exception_state);
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|    } else {
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|      size_t index = 0;
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|      while (index < style_sheet->length() && style_sheet->item(index) != rule)
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|        ++index;
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| -    ASSERT(index < style_sheet->length());
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| +    DCHECK_LT(index, style_sheet->length());
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|      style_sheet->deleteRule(index, exception_state);
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|    }
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|    // |rule| MAY NOT be addressed after this line!
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| @@ -1736,7 +1736,7 @@ CSSRule* InspectorStyleSheet::RuleForSourceData(
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|    if (it == source_data_to_rule_.end())
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|      return nullptr;
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|  
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| -  ASSERT(it->value < cssom_flat_rules_.size());
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| +  DCHECK_LT(it->value, cssom_flat_rules_.size());
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|  
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|    // Check that CSSOM did not mutate this rule.
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|    CSSRule* result = cssom_flat_rules_.at(it->value);
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| @@ -1759,7 +1759,7 @@ CSSRuleSourceData* InspectorStyleSheet::SourceDataForRule(CSSRule* rule) {
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|    if (it == rule_to_source_data_.end())
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|      return nullptr;
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|  
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| -  ASSERT(it->value < source_data_->size());
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| +  DCHECK_LT(it->value, source_data_->size());
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|  
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|    // Check that CSSOM did not mutate this rule.
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|    CSSRule* parsed_rule = parsed_flat_rules_.at(it->value);
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| 
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