Fix documentation for "pool" object in gn binary.

Followup to comments on https://codereview.chromium.org/2006923004/.

BUG=612786

Review-Url: https://codereview.chromium.org/2045713003
Cr-Original-Commit-Position: refs/heads/master@{#398400}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: e9efe32c54352ee81afac228219361eb77c832cf

tools/gn/docs/reference.md

diff --git a/tools/gn/docs/reference.md b/tools/gn/docs/reference.md
index c5b36cf..c29b24f 100644
--- a/tools/gn/docs/reference.md
+++ b/tools/gn/docs/reference.md
@@ -2151,8 +2151,8 @@
   the number of tasks that may run simultaneously.
 
   As the file containing the pool definition may be executed in the
-  of more than one toolchain it is recommended to specify an explicit
-  toolchain when definining and referencing a pool.
+  context of more than one toolchain it is recommended to specify an
+  explicit toolchain when defining and referencing a pool.
 
   A pool is referenced by its label just like a target.
 

tools/gn/functions.cc

diff --git a/tools/gn/functions.cc b/tools/gn/functions.cc
index 24bc2c9..9e8646f 100644
--- a/tools/gn/functions.cc
+++ b/tools/gn/functions.cc
@@ -692,8 +692,8 @@
     "  the number of tasks that may run simultaneously.\n"
     "\n"
     "  As the file containing the pool definition may be executed in the\n"
-    "  of more than one toolchain it is recommended to specify an explicit\n"
-    "  toolchain when definining and referencing a pool.\n"
+    "  context of more than one toolchain it is recommended to specify an\n"
+    "  explicit toolchain when defining and referencing a pool.\n"
     "\n"
     "  A pool is referenced by its label just like a target.\n"
     "\n"