rewrite includes to not need so much -Ifoo

Current strategy: everything from the top

Things to look at first are the manual changes:

   - added tools/rewrite_includes.py
   - removed -Idirectives from BUILD.gn
   - various compile.sh simplifications
   - tweak tools/embed_resources.py
   - update gn/find_headers.py to write paths from the top
   - update gn/gn_to_bp.py SkUserConfig.h layout
     so that #include "include/config/SkUserConfig.h" always
     gets the header we want.

No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index fdc7d59..e021fb5 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -5,50 +5,50 @@
  * found in the LICENSE file.
  */
 
-#include "SkCanvas.h"
+#include "include/core/SkCanvas.h"
 
-#include "SkArenaAlloc.h"
-#include "SkBitmapDevice.h"
-#include "SkCanvasPriv.h"
-#include "SkClipOpPriv.h"
-#include "SkClipStack.h"
-#include "SkColorFilter.h"
-#include "SkDraw.h"
-#include "SkDrawLooper.h"
-#include "SkGlyphRun.h"
-#include "SkImage.h"
-#include "SkImageFilter.h"
-#include "SkImageFilterCache.h"
-#include "SkImage_Base.h"
-#include "SkLatticeIter.h"
-#include "SkMSAN.h"
-#include "SkMakeUnique.h"
-#include "SkMatrixUtils.h"
-#include "SkNoDrawCanvas.h"
-#include "SkNx.h"
-#include "SkPaintPriv.h"
-#include "SkPatchUtils.h"
-#include "SkPathEffect.h"
-#include "SkPicture.h"
-#include "SkRRect.h"
-#include "SkRasterClip.h"
-#include "SkRasterHandleAllocator.h"
-#include "SkSpecialImage.h"
-#include "SkStrikeCache.h"
-#include "SkString.h"
-#include "SkSurface_Base.h"
-#include "SkTLazy.h"
-#include "SkTextBlob.h"
-#include "SkTextFormatParams.h"
-#include "SkTo.h"
-#include "SkTraceEvent.h"
-#include "SkVertices.h"
+#include "include/core/SkColorFilter.h"
+#include "include/core/SkDrawLooper.h"
+#include "include/core/SkImage.h"
+#include "include/core/SkImageFilter.h"
+#include "include/core/SkPathEffect.h"
+#include "include/core/SkPicture.h"
+#include "include/core/SkRRect.h"
+#include "include/core/SkRasterHandleAllocator.h"
+#include "include/core/SkString.h"
+#include "include/core/SkTextBlob.h"
+#include "include/core/SkVertices.h"
+#include "include/private/SkArenaAlloc.h"
+#include "include/private/SkNx.h"
+#include "include/private/SkTo.h"
+#include "include/utils/SkNoDrawCanvas.h"
+#include "src/core/SkBitmapDevice.h"
+#include "src/core/SkCanvasPriv.h"
+#include "src/core/SkClipOpPriv.h"
+#include "src/core/SkClipStack.h"
+#include "src/core/SkDraw.h"
+#include "src/core/SkGlyphRun.h"
+#include "src/core/SkImageFilterCache.h"
+#include "src/core/SkLatticeIter.h"
+#include "src/core/SkMSAN.h"
+#include "src/core/SkMakeUnique.h"
+#include "src/core/SkMatrixUtils.h"
+#include "src/core/SkPaintPriv.h"
+#include "src/core/SkRasterClip.h"
+#include "src/core/SkSpecialImage.h"
+#include "src/core/SkStrikeCache.h"
+#include "src/core/SkTLazy.h"
+#include "src/core/SkTextFormatParams.h"
+#include "src/core/SkTraceEvent.h"
+#include "src/image/SkImage_Base.h"
+#include "src/image/SkSurface_Base.h"
+#include "src/utils/SkPatchUtils.h"
 
 #include <new>
 
 #if SK_SUPPORT_GPU
-#include "GrContext.h"
-#include "SkGr.h"
+#include "include/gpu/GrContext.h"
+#include "src/gpu/SkGr.h"
 #endif
 
 #define RETURN_ON_NULL(ptr)     do { if (nullptr == (ptr)) return; } while (0)