Import definitions of V8 histograms from internal config

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 6561b783594dc34596c67c2eb9bcbc765537fd53..ec4c2629d7a201f8cb62deefb50b8134c7e6ac14 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -33678,6 +33678,269 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="V8.ASTOptimization">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>TBD</summary>
+</histogram>
+
+<histogram name="V8.CodeCreation">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>TBD</summary>
+</histogram>
+
+<histogram name="V8.CodeGeneration">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>Time spent generating native code for functions.</summary>
+</histogram>
+
+<histogram name="V8.CodegenFractionCrankshaft" units="percent">
+  <owner>rmcilroy@chromium.org</owner>
+  <summary>
+    Fraction of the total generated code which was generated using the
+    Crankshaft optimizing compiler, after each GC in percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.Compile">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>Time spent in V8 compiler.</summary>
+</histogram>
+
+<histogram name="V8.CompileEval">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>Time spent in V8 compiler for eval.</summary>
+</histogram>
+
+<histogram name="V8.CompileLazy">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>Time spent compiling functions lazily on first run.</summary>
+</histogram>
+
+<histogram name="V8.DeferredCodeGeneration">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>Time spent generating deferred code stubs.</summary>
+</histogram>
+
+<histogram name="V8.ExecutableMemoryMax" units="bytes">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    The maximum memory used to store V8 compiled code on a given process.
+  </summary>
+</histogram>
+
+<histogram name="V8.GCCompactor">
+  <owner>dmikurube@chromium.org</owner>
+  <owner>hpayer@chromium.org</owner>
+  <summary>Time spent in mark-sweep phase of GC.</summary>
+</histogram>
+
+<histogram name="V8.GCContext">
+  <owner>dmikurube@chromium.org</owner>
+  <summary>
+    Time spent GC'ing on context creation to get rid of older contexts.
+  </summary>
+</histogram>
+
+<histogram name="V8.GCScavenger">
+  <owner>dmikurube@chromium.org</owner>
+  <owner>hpayer@chromium.org</owner>
+  <summary>Time spent in scavenging phase of GC.</summary>
+</histogram>
+
+<histogram name="V8.MemoryExternalFragmentationCellSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <summary>
+    External memory fragmentation in the cell space after each GC in percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryExternalFragmentationCodeSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <summary>
+    External memory fragmentation in the code space after each GC in percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryExternalFragmentationLoSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <summary>
+    External memory fragmentation in the large object space after each GC in
+    percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryExternalFragmentationMapSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <summary>
+    External memory fragmentation in the map space after each GC in percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryExternalFragmentationOldDataSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <summary>
+    External memory fragmentation in the old data space after each GC in
+    percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryExternalFragmentationOldPointerSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <summary>
+    External memory fragmentation in the old pointer space after each GC in
+    percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryExternalFragmentationTotal" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <summary>
+    Total external memory fragmentation after each GC in percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapFractionCellSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <owner>rmcilroy@chromium.org</owner>
+  <summary>
+    Fraction of the total heap used by the cell space after each GC in percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapFractionCodeSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <owner>rmcilroy@chromium.org</owner>
+  <summary>
+    Fraction of the total heap used by the code space after each GC in percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapFractionLoSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <owner>rmcilroy@chromium.org</owner>
+  <summary>
+    Fraction of the total heap used by the lo space after each GC in percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapFractionMapSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <owner>rmcilroy@chromium.org</owner>
+  <summary>
+    Fraction of the total heap used by the map space after each GC in percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapFractionNewSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <owner>rmcilroy@chromium.org</owner>
+  <summary>
+    Fraction of the total heap used by the new space after each GC in percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapFractionOldDataSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <owner>rmcilroy@chromium.org</owner>
+  <summary>
+    Fraction of the total heap used by the old data space after each GC in
+    percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapFractionOldPointerSpace" units="percent">
+  <owner>dmikurube@chromium.org</owner>
+  <owner>rmcilroy@chromium.org</owner>
+  <summary>
+    Fraction of the total heap used by the old pointer space after each GC in
+    percent.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapSampleCellSpaceCommitted" units="KB">
+  <owner>dmikurube@chromium.org</owner>
+  <summary>
+    The size of committed memory in the cell space after each GC in KB.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapSampleCodeSpaceCommitted" units="KB">
+  <owner>dmikurube@chromium.org</owner>
+  <summary>
+    The size of committed memory in the code space after each GC in KB.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapSampleMapSpaceCommitted" units="KB">
+  <owner>dmikurube@chromium.org</owner>
+  <summary>
+    The size of committed memory in the map space after each GC in KB.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapSampleTotalCommitted" units="KB">
+  <owner>dmikurube@chromium.org</owner>
+  <owner>rmcilroy@chromium.org</owner>
+  <summary>
+    The total size of committed memory used by V8 after each GC in KB.
+  </summary>
+</histogram>
+
+<histogram name="V8.MemoryHeapSampleTotalUsed" units="KB">
+  <owner>dmikurube@chromium.org</owner>
+  <owner>rmcilroy@chromium.org</owner>
+  <summary>
+    The total size of live memory used by V8 after each GC in KB.
+  </summary>
+</histogram>
+
+<histogram name="V8.Parse">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>Time spent in V8 parser.</summary>
+</histogram>
+
+<histogram name="V8.ParseLazy">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    Time spent parsing functions when they are lazily compiled on first run.
+  </summary>
+</histogram>
+
+<histogram name="V8.PreParse">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>Time spent preparsing source code.</summary>
+</histogram>
+
+<histogram name="V8.Rewriting">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>Time spent on rewriting ASTs before compilation.</summary>
+</histogram>
+
+<histogram name="V8.RSetLO">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>TBD</summary>
+</histogram>
+
+<histogram name="V8.RSetPaged">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>TBD</summary>
+</histogram>
+
+<histogram name="V8.ScriptCache">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>TBD</summary>
+</histogram>
+
+<histogram name="V8.UsageAnalysis">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>Time spent analysing the usage of variables.</summary>
+</histogram>
+
+<histogram name="V8.VariableAllocation">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>TBD</summary>
+</histogram>
+
 <histogram name="Variations.DisabledNoEntropyProvider" enum="BooleanHit">
   <obsolete>
     Deprecated 1/2013. No longer tracked.