Revert 193798 "Revert r192949 "Disable shader disk cache by defa..."

trunk/src/gpu/command_buffer/service/memory_program_cache.cc

Index: trunk/src/gpu/command_buffer/service/memory_program_cache.cc
===================================================================
--- trunk/src/gpu/command_buffer/service/memory_program_cache.cc	(revision 194502)
+++ trunk/src/gpu/command_buffer/service/memory_program_cache.cc	(working copy)
@@ -142,8 +142,8 @@
   shader_b->set_uniform_map(value->uniform_map_1);
 
   if (!shader_callback.is_null() &&
-      !CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kDisableGpuShaderDiskCache)) {
+      CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableGpuShaderDiskCache)) {
     GpuProgramProto* proto = GpuProgramProto::default_instance().New();
     proto->set_sha(sha, kHashLength);
     proto->set_format(value->format);
@@ -212,8 +212,8 @@
   }
 
   if (!shader_callback.is_null() &&
-      !CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kDisableGpuShaderDiskCache)) {
+      CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableGpuShaderDiskCache)) {
     GpuProgramProto* proto = GpuProgramProto::default_instance().New();
     proto->set_sha(sha, kHashLength);
     proto->set_format(format);