implement getBufferSubDataAsync prototype

gpu/command_buffer/client/gles2_implementation_unittest.cc

Index: gpu/command_buffer/client/gles2_implementation_unittest.cc
diff --git a/gpu/command_buffer/client/gles2_implementation_unittest.cc b/gpu/command_buffer/client/gles2_implementation_unittest.cc
index b88e99b4b6519aeac4d46d83d782e3a553d0a17b..c491a7617816b3de5d6e90a4216d29e440c24db7 100644
--- a/gpu/command_buffer/client/gles2_implementation_unittest.cc
+++ b/gpu/command_buffer/client/gles2_implementation_unittest.cc
@@ -4430,6 +4430,59 @@ TEST_F(GLES2ImplementationTest, DeleteBuffersUnmapsDataStore) {
   EXPECT_EQ(GL_INVALID_OPERATION, CheckError());
 }
 
+TEST_F(GLES3ImplementationTest, GetBufferSubDataAsyncCHROMIUM) {
+  const GLuint kBufferId = 123;
+  void* mem;
+
+  const int TARGET_COUNT = 8;
+  GLenum targets[TARGET_COUNT] = {
+    GL_ARRAY_BUFFER,
+    GL_ELEMENT_ARRAY_BUFFER,
+    GL_COPY_READ_BUFFER,
+    GL_COPY_WRITE_BUFFER,
+    GL_TRANSFORM_FEEDBACK_BUFFER,
+    GL_UNIFORM_BUFFER,
+    GL_PIXEL_PACK_BUFFER,
+    GL_PIXEL_UNPACK_BUFFER,
+  };
+
+  // Positive tests
+  for (int i = 0; i < TARGET_COUNT; i++) {
+    gl_->BindBuffer(targets[i], kBufferId);
+    mem = gl_->GetBufferSubDataAsyncCHROMIUM(targets[i], 10, 64);
+    EXPECT_TRUE(mem != nullptr);
+    EXPECT_EQ(GL_NO_ERROR, CheckError());
+    gl_->FreeSharedMemory(mem);
+    EXPECT_EQ(GL_NO_ERROR, CheckError());
+    gl_->BindBuffer(targets[i], 0);
+  }
+
+  // Negative tests: invalid target
+  for (int i = 0; i < TARGET_COUNT; i++) {
+    GLenum wrong_target = targets[(i + 1) % TARGET_COUNT];
+    gl_->BindBuffer(targets[i], kBufferId);
+    mem = gl_->GetBufferSubDataAsyncCHROMIUM(wrong_target, 10, 64);
+    EXPECT_TRUE(mem == nullptr);
+    EXPECT_EQ(GL_INVALID_OPERATION, CheckError());
+    gl_->BindBuffer(targets[i], 0);
+  }
+}
+
+TEST_F(GLES3ImplementationTest, GetBufferSubDataAsyncCHROMIUMInvalidValue) {
+  const GLuint kBufferId = 123;
+  void* mem;
+
+  gl_->BindBuffer(GL_ARRAY_BUFFER, kBufferId);
+
+  mem = gl_->GetBufferSubDataAsyncCHROMIUM(GL_ARRAY_BUFFER, -1, 64);
+  EXPECT_TRUE(mem == nullptr);
+  EXPECT_EQ(GL_INVALID_VALUE, CheckError());
+
+  mem = gl_->GetBufferSubDataAsyncCHROMIUM(GL_ARRAY_BUFFER, 0, -1);
+  EXPECT_TRUE(mem == nullptr);
+  EXPECT_EQ(GL_INVALID_VALUE, CheckError());
+}
+
 TEST_F(GLES2ImplementationTest, GetInternalformativ) {
   const GLint kNumSampleCounts = 8;
   struct Cmds {