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/tools/skiaserve/Request.h b/tools/skiaserve/Request.h
index 3775af1..aef69c3 100644
--- a/tools/skiaserve/Request.h
+++ b/tools/skiaserve/Request.h
@@ -8,16 +8,16 @@
 #ifndef Request_DEFINED
 #define Request_DEFINED
 
-#include "SkTypes.h"
+#include "include/core/SkTypes.h"
 
-#include "GrContextFactory.h"
+#include "tools/gpu/GrContextFactory.h"
 
-#include "DebugCanvas.h"
-#include "SkPicture.h"
-#include "SkStream.h"
-#include "SkSurface.h"
+#include "include/core/SkPicture.h"
+#include "include/core/SkStream.h"
+#include "include/core/SkSurface.h"
+#include "tools/debugger/DebugCanvas.h"
 
-#include "UrlDataManager.h"
+#include "tools/UrlDataManager.h"
 
 namespace sk_gpu_test {
 class GrContextFactory;