Add multi-process GpuMemoryBuffer framework.

This adds a multi-process framework for reading/writing directly to
memory that the 3D graphics hardware can use for rendering without
any costly copying having to be done on the GPU process side.

A GpuMemoryBuffer is a type of shared memory that can be accessed
by the GPU. The high level procedure required to allocate this type
of memory is almost exactly the same as that for standard shared
memory. Only the browser process can allocated the memory and it
needs to be shared and registered with the GPU process before it can
be used.

This also adds a GpuMemoryBuffer type that is backed by standard
shared memory for testing purposes.

TEST=gpu_unittests --gtest_filter=MockGpuMemoryBufferTest.Lifecycle
BUG=261649

Review URL: https://codereview.chromium.org/19762004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230248 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 10 insertions, 0 deletions

diff --git a/content/common/gpu/gpu_command_buffer_stub.h b/content/common/gpu/gpu_command_buffer_stub.h
index 47c532b..a5258f2 100644
--- a/content/common/gpu/gpu_command_buffer_stub.h
+++ b/content/common/gpu/gpu_command_buffer_stub.h
@@ -24,6 +24,7 @@
 #include "ipc/ipc_sender.h"
 #include "media/base/video_decoder_config.h"
 #include "ui/events/latency_info.h"
+#include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 #include "ui/gl/gl_surface.h"
@@ -31,6 +32,7 @@
 #include "url/gurl.h"
 
 namespace gpu {
+class GpuControlService;
 struct Mailbox;
 namespace gles2 {
 class ImageManager;
@@ -181,6 +183,13 @@ class GpuCommandBufferStub
   void OnReceivedClientManagedMemoryStats(const GpuManagedMemoryStats& stats);
   void OnSetClientHasMemoryAllocationChangedCallback(bool has_callback);
 
+  void OnRegisterGpuMemoryBuffer(int32 id,
+                                 gfx::GpuMemoryBufferHandle gpu_memory_buffer,
+                                 uint32 width,
+                                 uint32 height,
+                                 uint32 internalformat);
+  void OnDestroyGpuMemoryBuffer(int32 id);
+
   void OnCommandProcessed();
   void OnParseError();
   void OnSetLatencyInfo(const ui::LatencyInfo& latency_info);
@@ -223,6 +232,7 @@ class GpuCommandBufferStub
   scoped_ptr<gpu::gles2::GLES2Decoder> decoder_;
   scoped_ptr<gpu::GpuScheduler> scheduler_;
   scoped_refptr<gfx::GLSurface> surface_;
+  scoped_ptr<gpu::GpuControlService> gpu_control_;
 
   scoped_ptr<GpuMemoryManagerClientState> memory_manager_client_state_;
   // The last memory allocation received from the GpuMemoryManager (used to