Add parameter to specify gyp dir to gyp_to_android.

platform_tools/android/bin/gyp_to_android.py

Index: platform_tools/android/bin/gyp_to_android.py
diff --git a/platform_tools/android/bin/gyp_to_android.py b/platform_tools/android/bin/gyp_to_android.py
index a42471b2e03e5101645ce9645d742956c1cc2892..34c81e1f5e38c7ca23fbfdf4b573cde7cc69f964 100755
--- a/platform_tools/android/bin/gyp_to_android.py
+++ b/platform_tools/android/bin/gyp_to_android.py
@@ -35,7 +35,8 @@ import gyp_gen.vars_dict_lib as vars_dict_lib
 GYP_FOLDER = 'gyp'
 
 
-def generate_var_dict(target_dir, target_file, skia_arch_type, have_neon):
+def generate_var_dict(target_dir, target_file, skia_arch_type, have_neon,
+                      gyp_source_dir):
   """Create a VarsDict for a particular arch type.
 
   Each paramater is passed directly to android_framework_gyp.main().
@@ -45,18 +46,20 @@ def generate_var_dict(target_dir, target_file, skia_arch_type, have_neon):
     target_file: Target gyp file.
     skia_arch_type: Target architecture.
     have_neon: Whether the target should build for neon.
+    gyp_source_dir: Directory for gyp source.
   Returns:
     A VarsDict containing the variable definitions determined by gyp.
   """
   result_file = android_framework_gyp.main(target_dir, target_file,
-                                           skia_arch_type, have_neon)
+                                           skia_arch_type, have_neon,
+                                           gyp_source_dir)
   var_dict = vars_dict_lib.VarsDict()
   gypd_parser.parse_gypd(var_dict, result_file, '.')
   android_framework_gyp.clean_gypd_files(target_dir)
   print '.',
   return var_dict
 
-def main(target_dir=None, require_sk_user_config=False):
+def main(target_dir=None, require_sk_user_config=False, gyp_source_dir=None):
   """Create Android.mk for the Android framework's external/skia.
 
   Builds Android.mk using Skia's gyp files.
@@ -66,6 +69,7 @@ def main(target_dir=None, require_sk_user_config=False):
       will be placed in skia's root directory.
     require_sk_user_config: If True, raise an AssertionError if
       SkUserConfig.h does not exist.
+    gyp_source_dir: Source directory for gyp.
   """
   # Create a temporary folder to hold gyp and gypd files. Create it in SKIA_DIR
   # so that it is a sibling of gyp/, so the relationships between gyp files and
@@ -95,19 +99,22 @@ def main(target_dir=None, require_sk_user_config=False):
     # The default uses a non-existant archtype, to find all the general
     # variable definitions.
     default_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'other',
-                                         False)
-    arm_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'arm', False)
+                                         False, gyp_source_dir)
+    arm_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'arm', False,
+                                     gyp_source_dir)
     arm_neon_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'arm',
-                                          True)
-    x86_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'x86', False)
+                                          True, gyp_source_dir)
+    x86_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'x86', False,
+                                     gyp_source_dir)
 
-    mips_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'mips', False)
+    mips_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'mips', False,
+                                      gyp_source_dir)
 
     mips64_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'mips64',
-                                        False)
+                                        False, gyp_source_dir)
 
     arm64_var_dict = generate_var_dict(tmp_folder, main_gyp_file, 'arm64',
-                                       False)
+                                       False, gyp_source_dir)
 
     # Compute the intersection of all targets. All the files in the intersection
     # should be part of the makefile always. Each dict will now contain trimmed