base: Increase hard limit for emulated discardable memory.

base/memory/discardable_memory_emulated.cc

Index: base/memory/discardable_memory_emulated.cc
diff --git a/base/memory/discardable_memory_emulated.cc b/base/memory/discardable_memory_emulated.cc
index 928a2dfdc7e0c294bb861e1157522ef5a2a0b468..d743ab3df5631cfe5e68b10db797b37c58dd3e5f 100644
--- a/base/memory/discardable_memory_emulated.cc
+++ b/base/memory/discardable_memory_emulated.cc
@@ -10,18 +10,19 @@
 namespace base {
 namespace {
 
-// This is admittedly pretty magical. It's approximately enough memory for four
-// 2560x1600 images.
-const size_t kEmulatedMemoryLimit = 64 * 1024 * 1024;
-const size_t kEmulatedBytesToKeepUnderModeratePressure =
-    kEmulatedMemoryLimit / 4;
+// This is admittedly pretty magical.
+const size_t kEmulatedMemoryLimit = 512 * 1024 * 1024;
+const size_t kEmulatedSoftMemoryLimit = 32 * 1024 * 1024;
+const size_t kEmulatedBytesToKeepUnderModeratePressure = 4 * 1024 * 1024;
+const size_t kEmulatedHardMemoryLimitExpirationTimeMs = 1000;
 
 struct SharedState {
   SharedState()
       : manager(kEmulatedMemoryLimit,
-                kEmulatedMemoryLimit,
+                kEmulatedSoftMemoryLimit,
                 kEmulatedBytesToKeepUnderModeratePressure,
-                TimeDelta::Max()) {}
+                TimeDelta::FromMilliseconds(
+                    kEmulatedHardMemoryLimitExpirationTimeMs)) {}
 
   internal::DiscardableMemoryManager manager;
 };