Add missing .h files to .gn files that have a .cc file next to it in the gn file already.

skia/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//printing/features/features.gni")
 import("//testing/test.gni")
 import("//third_party/skia/gn/shared_sources.gni")
@@ skipping 178 matching lines @@
   }
 }
 
 component("skia") {
   sources = [
     # Chrome sources.
     "config/SkUserConfig.h",
     "config/sk_ref_cnt_ext_debug.h",
     "config/sk_ref_cnt_ext_release.h",
     "ext/SkDiscardableMemory_chrome.cc",
+    "ext/SkDiscardableMemory_chrome.h",
     "ext/SkMemory_new_handler.cpp",
     "ext/analysis_canvas.cc",
+    "ext/analysis_canvas.h",
     "ext/benchmarking_canvas.cc",
+    "ext/benchmarking_canvas.h",
     "ext/convolver.cc",
+    "ext/convolver.h",
     "ext/event_tracer_impl.cc",
+    "ext/event_tracer_impl.h",
     "ext/fontmgr_default_android.cc",
+    "ext/fontmgr_default_android.h",
     "ext/fontmgr_default_linux.cc",
+    "ext/fontmgr_default_linux.h",
     "ext/fontmgr_default_win.cc",
+    "ext/fontmgr_default_win.h",
     "ext/google_logging.cc",
     "ext/image_operations.cc",
+    "ext/image_operations.h",
     "ext/opacity_filter_canvas.cc",
+    "ext/opacity_filter_canvas.h",
     "ext/recursive_gaussian_convolution.cc",
+    "ext/recursive_gaussian_convolution.h",
     "ext/skia_encode_image.cc",
     "ext/skia_encode_image.h",
     "ext/skia_histogram.cc",
+    "ext/skia_histogram.h",
     "ext/skia_memory_dump_provider.cc",
+    "ext/skia_memory_dump_provider.h",
     "ext/skia_trace_memory_dump_impl.cc",
+    "ext/skia_trace_memory_dump_impl.h",
     "ext/skia_utils_base.cc",
+    "ext/skia_utils_base.h",
     "ext/skia_utils_ios.h",
     "ext/skia_utils_ios.mm",
+    "ext/skia_utils_mac.h",
     "ext/skia_utils_mac.mm",
     "ext/skia_utils_win.cc",
+    "ext/skia_utils_win.h",
   ]
 
   if (!is_ios) {
-    sources += [ "ext/platform_canvas.cc" ]
+    sources += [
+      "ext/platform_canvas.cc",
+      "ext/platform_canvas.h",
+    ]
   }
   if (!is_ios && (current_cpu == "x86" || current_cpu == "x64")) {
-    sources += [ "ext/convolver_SSE2.cc" ]
+    sources += [
+      "ext/convolver_SSE2.cc",
+      "ext/convolver_SSE2.h",
+    ]
   } else if (current_cpu == "mipsel" && mips_dsp_rev >= 2) {
-    sources += [ "ext/convolver_mips_dspr2.cc" ]
+    sources += [
+      "ext/convolver_mips_dspr2.cc",
+      "ext/convolver_mips_dspr2.h",
+    ]
   }
 
   # The imported Skia gni source paths are made absolute by gn.
   sources += skia_core_sources
   sources += skia_effects_sources
   sources += skia_utils_sources
   sources += skia_xps_sources
   sources += [
     "//third_party/skia/src/fonts/SkFontMgr_indirect.cpp",
     "//third_party/skia/src/fonts/SkRemotableFontMgr.cpp",
@@ skipping 47 matching lines @@
   # need separate win section to handle chromes auto gn filter
   # (build/config/BUILDCONFIG.gn)
   if (is_win) {
     sources -= [
       #windows
       "//third_party/skia/src/utils/win/SkWGL_win.cpp",
     ]
   }
 
   if (is_android && (!enable_basic_printing && !enable_print_preview)) {
-    sources -= [ "ext/skia_utils_base.cc" ]
+    sources -= [
+      "ext/skia_utils_base.cc",
+      "ext/skia_utils_base.h",
+    ]
   }
 
   # Select Skia ports.
   if (is_win) {
     sources += [
       "//third_party/skia/src/ports/SkFontHost_win.cpp",
       "//third_party/skia/src/ports/SkFontMgr_win_dw.cpp",
       "//third_party/skia/src/ports/SkOSFile_win.cpp",
       "//third_party/skia/src/ports/SkRemotableFontMgr_win_dw.cpp",
       "//third_party/skia/src/ports/SkScalerContext_win_dw.cpp",
@@ skipping 363 matching lines @@
 
     deps = [
       ":skia",
       "//base",
       "//base/test:test_support",
       "//build/config/sanitizers:deps",
       "//build/win:default_exe_manifest",
     ]
   }
 }