On Android uses system properties instead of environment variables.

Source/bindings/dart/DartController.cpp

Index: Source/bindings/dart/DartController.cpp
===================================================================
--- Source/bindings/dart/DartController.cpp	(revision 1462)
+++ Source/bindings/dart/DartController.cpp	(working copy)
@@ -30,6 +30,11 @@
 #include "config.h"
 #include "bindings/dart/DartController.h"
 
+#if defined(ANDROID)
+#include <sys/system_properties.h>
+#endif
+
+
 #include "DartDocument.h"
 #include "DartWindow.h"
 #include "HTMLNames.h"
@@ -179,9 +184,18 @@
     domData->setTypedDataLibrary(Dart_NewPersistentHandle(typedData));
 
     // Setup configuration closures
+#if defined(ANDROID)
+    char forwardingProperty[PROP_VALUE_MAX];
+    int propLen =
+        __system_property_get("DART_FORWARDING_PRINT", &forwardingProperty[0]);
+    const char * const printClosure = (propLen > 0) ?

[Anton Muhin, 2013/10/24 06:01:50]

maybe introduce bool forwardPrint which is platform specific and then


const char * const printClosure = forwardPrint ? " _fPC" : (isDOMEnable ? "_pC"
: "_pISPC"

?

+        "_forwardingPrintClosure" :
+        (isDOMEnabled ?  "_printClosure" : "_pureIsolatePrintClosure");
+#else
     const char * const printClosure = getenv("DART_FORWARDING_PRINT") ?
         "_forwardingPrintClosure" :
         (isDOMEnabled ?  "_printClosure" : "_pureIsolatePrintClosure");
+#endif
     copyValue(html, printClosure, "dart:_collection-dev", 0, "_printClosure");
     copyValue(html, isDOMEnabled ? "_timerFactoryClosure" : "_pureIsolateTimerFactoryClosure", "dart:async", "_TimerFactory", "_factory");
     copyValue(html, isDOMEnabled ? "_scheduleImmediateClosure" : "_pureIsolateScheduleImmediateClosure", "dart:async", "_ScheduleImmediate", "_closure");