Implement TransformFeedbackManager in GPU command buffer.

gpu/command_buffer/service/buffer_manager.cc

 // Copyright (c) 2012 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 "gpu/command_buffer/service/buffer_manager.h"
 
 #include <stdint.h>
 
 #include <limits>
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/trace_event.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/context_state.h"
 #include "gpu/command_buffer/service/error_state.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/memory_tracking.h"
+#include "gpu/command_buffer/service/transform_feedback_manager.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_implementation.h"
+#include "ui/gl/gl_version_info.h"
 #include "ui/gl/trace_util.h"
 
 namespace gpu {
 namespace gles2 {
 
 BufferManager::BufferManager(MemoryTracker* memory_tracker,
                              FeatureInfo* feature_info)
     : memory_type_tracker_(
           new MemoryTypeTracker(memory_tracker)),
       memory_tracker_(memory_tracker),
@@ skipping 369 matching lines @@
     return;
   }
 
   if (!memory_type_tracker_->EnsureGPUMemoryAvailable(size)) {
     ERRORSTATE_SET_GL_ERROR(
         error_state, GL_OUT_OF_MEMORY, "glBufferData", "out of memory");
     return;
   }
 
   DoBufferData(error_state, buffer, target, size, usage, data);
+
+  if (context_state->bound_transform_feedback.get()) {
+    // buffer size might have changed, and on Desktop GL lower than 4.2,
+    // we might need to reset transform feedback buffer range.
+    context_state->bound_transform_feedback->OnBufferData(
+        feature_info_->gl_version_info(), target, buffer);
+  }
 }
 
 
 void BufferManager::DoBufferData(
     ErrorState* error_state,
     Buffer* buffer,
     GLenum target,
     GLsizeiptr size,
     GLenum usage,
     const GLvoid* data) {
@@ skipping 221 matching lines @@
     auto guid = gfx::GetGLBufferGUIDForTracing(
         memory_tracker_->ShareGroupTracingGUID(), client_buffer_id);
     pmd->CreateSharedGlobalAllocatorDump(guid);
     pmd->AddOwnershipEdge(dump->guid(), guid);
   }
   return true;
 }
 
 }  // namespace gles2
 }  // namespace gpu