Pepper: Change '*_sources' variables in ppapi_sources.gypi to '*_source_files'.

ppapi/ppapi_sources.gypi

Index: ppapi/ppapi_sources.gypi
diff --git a/ppapi/ppapi_sources.gypi b/ppapi/ppapi_sources.gypi
index 94f10fb51d98f76ca08b6fced3a15fd4fe30967f..0d75fb5080caaa09868bf15f02cd8925a7804c40 100644
--- a/ppapi/ppapi_sources.gypi
+++ b/ppapi/ppapi_sources.gypi
@@ -4,7 +4,7 @@
 
 {
   'variables': {
-    'c_sources': [
+    'c_source_files': [
       'c/pp_bool.h',
       'c/pp_completion_callback.h',
       'c/pp_errors.h',
@@ -115,7 +115,7 @@
       'c/trusted/ppb_url_loader_trusted.h',
       'c/trusted/ppp_broker.h',
     ],
-    'cpp_sources': [
+    'cpp_source_files': [
       'cpp/audio.cc',
       'cpp/audio.h',
       'cpp/audio_config.cc',
@@ -247,7 +247,7 @@
     #
     # Common Testing source for trusted and untrusted (NaCl) pugins.
     #
-    'test_sources_common': [
+    'test_common_source_files': [
       # Common test files
       'tests/all_c_includes.h',
       'tests/all_cpp_includes.h',
@@ -272,7 +272,7 @@
     #
     # Sources used in NaCl tests.
     #
-    'test_sources_nacl': [
+    'test_nacl_source_files': [
       # Test cases (PLEASE KEEP THIS SECTION IN ALPHABETICAL ORDER)
       'tests/test_audio_config.cc',
       'tests/test_cursor_control.cc',
@@ -291,7 +291,7 @@
     #
     # Sources used in trusted tests.
     #
-    'test_sources_trusted': [
+    'test_trusted_source_files': [
       # Test cases (PLEASE KEEP THIS SECTION IN ALPHABETICAL ORDER)
       'tests/test_audio.cc',
       'tests/test_audio.h',
@@ -373,10 +373,10 @@
   'conditions': [
     ['p2p_apis==1', {
       'variables': {
-        'c_sources': [
+        'c_source_files': [
           'c/dev/ppb_transport_dev.h',
         ],
-        'cpp_sources': [
+        'cpp_source_files': [
           'cpp/dev/transport_dev.cc',
           'cpp/dev/transport_dev.h',
         ],