Gyp flag to disable inlining.

To turn off all inlining, rebuild after running the command

$ GYP_DEFINES=skia_disable_inlining=1 ./gyp_skia

Provides an initial value in one GM to avoid an uninitialized variable warning.

BUG=skia:2126
R=scroggo@google.com, mtklein@google.com, tomhudson@google.com

Author: tomhudson@chromium.org

Review URL: https://codereview.chromium.org/163363004

git-svn-id: http://skia.googlecode.com/svn/trunk@13437 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/common_variables.gypi b/gyp/common_variables.gypi
index 26b9961..d02d465 100644
--- a/gyp/common_variables.gypi
+++ b/gyp/common_variables.gypi
@@ -175,6 +175,7 @@
     'ios_sdk_version%': '6.0',
     'skia_win_debuggers_path%': '<(skia_win_debuggers_path)',
     'skia_run_pdfviewer_in_gm%': 0,
+    'skia_disable_inlining%': 0,
 
     # These are referenced by our .gypi files that list files (e.g. core.gypi)
     #