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/gpu/GrResourceProvider.cpp b/src/gpu/GrResourceProvider.cpp
index d4346cd..77f5759 100644
--- a/src/gpu/GrResourceProvider.cpp
+++ b/src/gpu/GrResourceProvider.cpp
@@ -5,25 +5,25 @@
  * found in the LICENSE file.
  */
 
-#include "GrResourceProvider.h"
-#include "../private/GrSingleOwner.h"
-#include "GrBackendSemaphore.h"
-#include "GrCaps.h"
-#include "GrContext.h"
-#include "GrContextPriv.h"
-#include "GrGpu.h"
-#include "GrGpuBuffer.h"
-#include "GrPath.h"
-#include "GrPathRendering.h"
-#include "GrProxyProvider.h"
-#include "GrRenderTargetPriv.h"
-#include "GrResourceCache.h"
-#include "GrResourceKey.h"
-#include "GrSemaphore.h"
-#include "GrStencilAttachment.h"
-#include "GrTexturePriv.h"
-#include "SkGr.h"
-#include "SkMathPriv.h"
+#include "include/gpu/GrBackendSemaphore.h"
+#include "include/gpu/GrContext.h"
+#include "include/private/GrResourceKey.h"
+#include "include/private/GrSingleOwner.h"
+#include "src/core/SkMathPriv.h"
+#include "src/gpu/GrCaps.h"
+#include "src/gpu/GrContextPriv.h"
+#include "src/gpu/GrGpu.h"
+#include "src/gpu/GrGpuBuffer.h"
+#include "src/gpu/GrPath.h"
+#include "src/gpu/GrPathRendering.h"
+#include "src/gpu/GrProxyProvider.h"
+#include "src/gpu/GrRenderTargetPriv.h"
+#include "src/gpu/GrResourceCache.h"
+#include "src/gpu/GrResourceProvider.h"
+#include "src/gpu/GrSemaphore.h"
+#include "src/gpu/GrStencilAttachment.h"
+#include "src/gpu/GrTexturePriv.h"
+#include "src/gpu/SkGr.h"
 
 const uint32_t GrResourceProvider::kMinScratchTextureSize = 16;