Use DiscardableMemoryManager on Android.

base/memory/discardable_memory_unittest.cc

Index: base/memory/discardable_memory_unittest.cc
diff --git a/base/memory/discardable_memory_unittest.cc b/base/memory/discardable_memory_unittest.cc
index d4c295565508171dc471fbf07df535609523275e..32e89b58dab3b11e683f5ac12537d4337381ef52 100644
--- a/base/memory/discardable_memory_unittest.cc
+++ b/base/memory/discardable_memory_unittest.cc
@@ -6,6 +6,7 @@
 
 #include <algorithm>
 
+#include "base/logging.h"
 #include "base/run_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -28,6 +29,10 @@ class DiscardableMemoryTest
   }
 
  protected:
+  DiscardableMemoryType GetCurrentDiscardableMemoryType() const {
+    return GetParam();
+  }
+
   scoped_ptr<DiscardableMemory> CreateLockedMemory(size_t size) {
     return DiscardableMemory::CreateLockedMemoryWithType(
         GetParam(), size).Pass();
@@ -47,7 +52,7 @@ TEST_P(DiscardableMemoryTest, IsNamed) {
 
 bool IsNativeType(DiscardableMemoryType type) {
   return
-      type == DISCARDABLE_MEMORY_TYPE_ANDROID ||
+      type == DISCARDABLE_MEMORY_TYPE_ASHMEM ||
       type == DISCARDABLE_MEMORY_TYPE_MAC;
 }
 
@@ -91,19 +96,21 @@ TEST_P(DiscardableMemoryTest, DeleteWhileLocked) {
   ASSERT_TRUE(memory);
 }
 
-#if !defined(OS_ANDROID)
 // Test forced purging.
 TEST_P(DiscardableMemoryTest, Purge) {
-  ASSERT_TRUE(DiscardableMemory::PurgeForTestingSupported());
+  if (!DiscardableMemory::PurgeForTestingSupported(
+          GetCurrentDiscardableMemoryType())) {
+    NOTIMPLEMENTED();
+    return;
+  }
 
   const scoped_ptr<DiscardableMemory> memory(CreateLockedMemory(kSize));
   ASSERT_TRUE(memory);
   memory->Unlock();
 
-  DiscardableMemory::PurgeForTesting();
+  DiscardableMemory::PurgeForTesting(GetCurrentDiscardableMemoryType());
   EXPECT_EQ(DISCARDABLE_MEMORY_LOCK_STATUS_PURGED, memory->Lock());
 }
-#endif  // !OS_ANDROID
 
 #if !defined(NDEBUG) && !defined(OS_ANDROID)
 // Death tests are not supported with Android APKs.