Update and fix some markdown docs

docs/chromium_integration.md

Index: docs/chromium_integration.md
diff --git a/docs/chromium_integration.md b/docs/chromium_integration.md
index a9431ebc3126d062d782f6d7f4e4f4fe2860f0db..7a9ce706968694fb2e08f58bf8839f9d1dbde84d 100644
--- a/docs/chromium_integration.md
+++ b/docs/chromium_integration.md
@@ -8,10 +8,10 @@
 ## Build system
 
 Most of NaCl, including the trusted runtime and tests, is built using Scons.
-However, Chromium ignores NaCl's Scons build system and uses Gyp to build NaCl
+However, Chromium ignores NaCl's Scons build system and uses gn to build NaCl
 (in the same way as it ignores Webkit's own build system). This is why there are
-`*.gyp` and `*.gypi` files in the NaCl tree, though the NaCl standalone build
-doesn't use them. These Gyp files cover NaCl's trusted code but not tests.
+`*.gn` and `*.gni` files in the NaCl tree, though the NaCl standalone build
+doesn't use them. These gn files cover NaCl's trusted code but not tests.
 
 ## sel\_ldr