Implement out-of-process proxy for PPB_Buffer_Dev.

ppapi/tests/test_buffer.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/tests/test_buffer.h"
 
 #include "ppapi/c/dev/ppb_buffer_dev.h"
 #include "ppapi/cpp/dev/buffer_dev.h"
 #include "ppapi/cpp/graphics_2d.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/tests/testing_instance.h"
 
 REGISTER_TEST_CASE(Buffer);
 
 bool TestBuffer::Init() {
   buffer_interface_ = reinterpret_cast<PPB_Buffer_Dev const*>(
       pp::Module::Get()->GetBrowserInterface(PPB_BUFFER_DEV_INTERFACE));
   return !!buffer_interface_;
 }
 
 void TestBuffer::RunTest() {
   instance_->LogTest("InvalidSize", TestInvalidSize());
   instance_->LogTest("InitToZero", TestInitToZero());
   instance_->LogTest("IsBuffer", TestIsBuffer());
+  instance_->LogTest("BasicLifecyle", TestBasicLifeCycle());
 }
 
 std::string TestBuffer::TestInvalidSize() {
   pp::Buffer_Dev zero_size(instance_, 0);
   if (!zero_size.is_null())
     return "Zero size accepted";
 
   PASS();
 }
 
@@ skipping 32 matching lines @@
   // Make a valid buffer.
   pp::Buffer_Dev buffer(instance_, 100);
   if (buffer.is_null())
     return "Couldn't create buffer";
   if (!buffer_interface_->IsBuffer(buffer.pp_resource()))
     return "Buffer should be identified as a buffer";
 
   PASS();
 }
 
+std::string TestBuffer::TestBasicLifeCycle() {
+  enum { kBufferSize = 100 };
+
+  pp::Buffer_Dev *buffer = new pp::Buffer_Dev(instance_, kBufferSize);
+  if (buffer->is_null() ||
+      !buffer_interface_->IsBuffer(buffer->pp_resource()) ||
+      buffer->size() != kBufferSize) {
+    return "Error creating buffer (earlier test should have failed)";
+  }
+
+  // Test that the buffer got created & mapped.
+  if (buffer->data() == NULL)
+    return "Failed to Map() buffer";
+
+  // Test that the buffer is writeable.
+  char* data = static_cast<char*>(buffer->data());
+  for (int i = 0; i < kBufferSize; ++i)
+    data[i] = 'X';
+
+  // Implicitly test that destroying the buffer doesn't encounter a fatal error
+  // in Unmap.
+  delete buffer;
+
+  PASS();
+}