GLES ProgramCache listens to memory pressure

gpu/command_buffer/common/constants.h

Index: gpu/command_buffer/common/constants.h
diff --git a/gpu/command_buffer/common/constants.h b/gpu/command_buffer/common/constants.h
index 7b80a33651160f7f7609b136d40eda7e344069a4..70d0b4e345dc18541a0c0d5a508b53a08962c3fe 100644
--- a/gpu/command_buffer/common/constants.h
+++ b/gpu/command_buffer/common/constants.h
@@ -8,6 +8,8 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include "build/build_config.h"
+
 namespace gpu {
 
 typedef int32_t CommandBufferOffset;
@@ -68,8 +70,14 @@ const int32_t kInvalidSharedMemoryId = -1;
 // Common Command Buffer shared memory transfer buffer ID.
 const int32_t kCommandBufferSharedMemoryId = 4;
 
-// The size to set for the program cache.
+// The size to set for the program cache for default and low-end device cases.
+#if !defined(OS_ANDROID)
 const size_t kDefaultMaxProgramCacheMemoryBytes = 6 * 1024 * 1024;
+const size_t kLowEndMaxProgramCacheMemoryBytes = 6 * 1024 * 1024;
+#else
+const size_t kDefaultMaxProgramCacheMemoryBytes = 2 * 1024 * 1024;
+const size_t kLowEndMaxProgramCacheMemoryBytes = 512 * 1024;
+#endif
 
 // Namespace used to separate various command buffer types.
 enum CommandBufferNamespace : int8_t {