tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 391242f244846eb38985d9e8a0799f8e83157fcf..eb56854471e02a28548f88454e0b94e3aa4675f0 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -4049,6 +4049,16 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Compressed/Decompressed size ratio.</summary>
 </histogram>
 
+<histogram name="BrotliFilter.ErrorCode" enum="BrotliFilterErrorCode">
+  <owner>eustas@chromium.org</owner>
+  <summary>More detailed failure reason.</summary>
+</histogram>
+
+<histogram name="BrotliFilter.GzipHeaderDetected" enum="BooleanPresent">
+  <owner>eustas@chromium.org</owner>
+  <summary>Indicates whether the gzip-like header was detected.</summary>
+</histogram>
+
 <histogram name="BrotliFilter.Status" enum="BrotliFilterDecodingStatus">
   <owner>eustas@chromium.org</owner>
   <summary>The final state of BrotliFilter.</summary>
@@ -64795,6 +64805,46 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="2" label="Error"/>
 </enum>
 
+<enum name="BrotliFilterErrorCode" type="int">
+  <int value="0" label="NO_ERROR"/>
+  <int value="1" label="FORMAT_EXUBERANT_NIBBLE"/>
+  <int value="2" label="FORMAT_RESERVED"/>
+  <int value="3" label="FORMAT_EXUBERANT_META_NIBBLE"/>
+  <int value="4" label="FORMAT_SIMPLE_HUFFMAN_ALPHABET"/>
+  <int value="5" label="FORMAT_SIMPLE_HUFFMAN_SAME"/>
+  <int value="6" label="FORMAT_CL_SPACE"/>
+  <int value="7" label="FORMAT_HUFFMAN_SPACE"/>
+  <int value="8" label="FORMAT_CONTEXT_MAP_REPEAT"/>
+  <int value="9" label="FORMAT_BLOCK_LENGTH_1"/>
+  <int value="10" label="FORMAT_BLOCK_LENGTH_2"/>
+  <int value="11" label="FORMAT_TRANSFORM"/>
+  <int value="12" label="FORMAT_DICTIONARY"/>
+  <int value="13" label="FORMAT_WINDOW_BITS"/>
+  <int value="14" label="FORMAT_PADDING_1"/>
+  <int value="15" label="FORMAT_PADDING_2"/>
+  <int value="16" label="Reserved (16)"/>
+  <int value="17" label="Reserved (17)"/>
+  <int value="18" label="Reserved (18)"/>
+  <int value="19" label="Reserved (19)"/>
+  <int value="20" label="Reserved (20)"/>
+  <int value="21" label="ALLOC_CONTEXT_MODES"/>
+  <int value="22" label="ALLOC_TREE_GROUPS"/>
+  <int value="23" label="Reserved (23)"/>
+  <int value="24" label="Reserved (24)"/>
+  <int value="25" label="ALLOC_CONTEXT_MAP"/>
+  <int value="26" label="ALLOC_RING_BUFFER_1"/>
+  <int value="27" label="ALLOC_RING_BUFFER_2"/>
+  <int value="28" label="Reserved (28)"/>
+  <int value="29" label="Reserved (29)"/>
+  <int value="30" label="ALLOC_BLOCK_TYPE_TREES"/>
+  <int value="31" label="UNREACHABLE_1"/>
+  <int value="32" label="UNREACHABLE_2"/>
+  <int value="33" label="UNREACHABLE_3"/>
+  <int value="34" label="UNREACHABLE_4"/>
+  <int value="35" label="UNREACHABLE_5"/>
+  <int value="36" label="UNREACHABLE_6"/>
+</enum>
+
 <enum name="BubbleType" type="int">
   <int value="0" label="Unknown Bubble"/>
   <int value="1" label="Mock Bubble"/>