Disable shader disk cache by default.

gpu/command_buffer/service/memory_program_cache_unittest.cc

Index: gpu/command_buffer/service/memory_program_cache_unittest.cc
diff --git a/gpu/command_buffer/service/memory_program_cache_unittest.cc b/gpu/command_buffer/service/memory_program_cache_unittest.cc
index f20caeb7a40460c30c419e3b16cc9f52defb39f9..f9d4c238d849d80a9e10f26fdaf2c5ff2fd98836 100644
--- a/gpu/command_buffer/service/memory_program_cache_unittest.cc
+++ b/gpu/command_buffer/service/memory_program_cache_unittest.cc
@@ -204,37 +204,6 @@ TEST_F(MemoryProgramCacheTest, CacheSave) {
       *vertex_shader_->deferred_compilation_source(),
       *fragment_shader_->deferred_compilation_source(),
       NULL));
-  EXPECT_EQ(1, shader_cache_count());
-}
-
-TEST_F(MemoryProgramCacheTest, LoadProgram) {
-  const GLenum kFormat = 1;
-  const int kProgramId = 10;
-  const int kBinaryLength = 20;
-  char test_binary[kBinaryLength];
-  for (int i = 0; i < kBinaryLength; ++i) {
-    test_binary[i] = i;
-  }
-  ProgramBinaryEmulator emulator(kBinaryLength, kFormat, test_binary);
-
-  SetExpectationsForSaveLinkedProgram(kProgramId, &emulator);
-  cache_->SaveLinkedProgram(kProgramId, vertex_shader_, fragment_shader_, NULL,
-                            base::Bind(&MemoryProgramCacheTest::ShaderCacheCb,
-                                       base::Unretained(this)));
-
-  EXPECT_EQ(ProgramCache::LINK_SUCCEEDED, cache_->GetLinkedProgramStatus(
-      *vertex_shader_->deferred_compilation_source(),
-      *fragment_shader_->deferred_compilation_source(),
-      NULL));
-  EXPECT_EQ(1, shader_cache_count());
-
-  cache_->Clear();
-
-  cache_->LoadProgram(shader_cache_shader());
-  EXPECT_EQ(ProgramCache::LINK_SUCCEEDED, cache_->GetLinkedProgramStatus(
-      *vertex_shader_->deferred_compilation_source(),
-      *fragment_shader_->deferred_compilation_source(),
-      NULL));
 }
 
 TEST_F(MemoryProgramCacheTest, CacheLoadMatchesSave) {
@@ -251,7 +220,6 @@ TEST_F(MemoryProgramCacheTest, CacheLoadMatchesSave) {
   cache_->SaveLinkedProgram(kProgramId, vertex_shader_, fragment_shader_, NULL,
                             base::Bind(&MemoryProgramCacheTest::ShaderCacheCb,
                                        base::Unretained(this)));
-  EXPECT_EQ(1, shader_cache_count());
 
   VariableMap vertex_attrib_map = vertex_shader_->attrib_map();
   VariableMap vertex_uniform_map = vertex_shader_->uniform_map();
@@ -295,7 +263,6 @@ TEST_F(MemoryProgramCacheTest, LoadProgramMatchesSave) {
   cache_->SaveLinkedProgram(kProgramId, vertex_shader_, fragment_shader_, NULL,
                             base::Bind(&MemoryProgramCacheTest::ShaderCacheCb,
                                        base::Unretained(this)));
-  EXPECT_EQ(1, shader_cache_count());
 
   VariableMap vertex_attrib_map = vertex_shader_->attrib_map();
   VariableMap vertex_uniform_map = vertex_shader_->uniform_map();
@@ -309,9 +276,6 @@ TEST_F(MemoryProgramCacheTest, LoadProgramMatchesSave) {
 
   SetExpectationsForLoadLinkedProgram(kProgramId, &emulator);
 
-  cache_->Clear();
-  cache_->LoadProgram(shader_cache_shader());
-
   EXPECT_EQ(ProgramCache::PROGRAM_LOAD_SUCCESS, cache_->LoadLinkedProgram(
       kProgramId,
       vertex_shader_,