Add various missing header files to BUILD.gn.

Change-Id: I6f4409e9e8c6d4a6d71bc41e57dce7417d7788f3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/302440
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 4297a83..f3a10ca 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1587,20 +1587,33 @@
       "tools/AndroidSkDebugToStdOut.cpp",
       "tools/AutoreleasePool.h",
       "tools/DDLPromiseImageHelper.cpp",
+      "tools/DDLPromiseImageHelper.h",
       "tools/DDLTileHelper.cpp",
+      "tools/DDLTileHelper.h",
       "tools/LsanSuppressions.cpp",
       "tools/ProcStats.cpp",
+      "tools/ProcStats.h",
       "tools/Resources.cpp",
+      "tools/Resources.h",
       "tools/SkMetaData.cpp",
       "tools/SkMetaData.h",
       "tools/SkSharingProc.cpp",
+      "tools/SkSharingProc.h",
+      "tools/Stats.h",
       "tools/ToolUtils.cpp",
+      "tools/ToolUtils.h",
       "tools/UrlDataManager.cpp",
+      "tools/UrlDataManager.h",
       "tools/debugger/DebugCanvas.cpp",
+      "tools/debugger/DebugCanvas.h",
       "tools/debugger/DebugLayerManager.cpp",
+      "tools/debugger/DebugLayerManager.h",
       "tools/debugger/DrawCommand.cpp",
+      "tools/debugger/DrawCommand.h",
       "tools/debugger/JsonWriteBuffer.cpp",
+      "tools/debugger/JsonWriteBuffer.h",
       "tools/fonts/RandomScalerContext.cpp",
+      "tools/fonts/RandomScalerContext.h",
       "tools/fonts/TestEmptyTypeface.h",
       "tools/fonts/TestFontMgr.cpp",
       "tools/fonts/TestFontMgr.h",
@@ -1610,8 +1623,10 @@
       "tools/fonts/TestTypeface.h",
       "tools/fonts/ToolUtilsFont.cpp",
       "tools/random_parse_path.cpp",
+      "tools/random_parse_path.h",
       "tools/timer/TimeUtils.h",
       "tools/timer/Timer.cpp",
+      "tools/timer/Timer.h",
     ]
     if (target_cpu != "wasm") {
       sources += [ "tools/CrashHandler.cpp" ]