[GPU] Get GPU process running on the mac

Initial port of GPU process / plugin to Mac OS X. Uses new IOSurface
APIs and therefore currently runs only on 10.6. Alternate strategy
will need to be devised for 10.5.

Slight UI issues remain such as GPU plugins initially showing up in
the wrong place on the page. These will be fixed in follow-on bugs.

Minimal changes made to command buffer code to get it to compile on
Mac OS X. Commented out use of nested anonymous namespaces in
gles2_cmd_decoder.cc which were causing the linker to crash with a seg
fault.

Refactored gyp files so the OS test enabling the GPU plugin is in one
place, common.gypi, and other files test only the variable enable_gpu.

Slight change to gles2_demo_cc.cc to add some simple animation to
verify that updates from the GPU plugin are reaching the screen.
Changed Pepper test plugin to use 3D view by default and commented out
use of audio context because of recent issues.

TEST=none (ran Pepper Test Plugin with 3D view enabled)
BUG=http://crbug.com/25988

Review URL: http://codereview.chromium.org/558035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@37934 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 0 deletions

diff --git a/gpu/command_buffer/service/gpu_processor.h b/gpu/command_buffer/service/gpu_processor.h
index dd22ac4..f22f249 100644
--- a/gpu/command_buffer/service/gpu_processor.h
+++ b/gpu/command_buffer/service/gpu_processor.h
@@ -44,6 +44,19 @@ class GPUProcessor : public base::RefCounted<GPUProcessor>,
   virtual bool SetGetOffset(int32 offset);
   virtual int32 GetGetOffset();
 
+#if defined(OS_MACOSX)
+  // Needed only on Mac OS X, which does not render into an on-screen
+  // window and therefore requires the backing store to be resized
+  // manually. Returns an opaque identifier for the new backing store.
+  virtual uint64 SetWindowSize(int32 width, int32 height);
+
+#endif
+
+  // Sets a callback which is called when a SwapBuffers command is processed.
+  // Must be called after Initialize().
+  // It is not defined on which thread this callback is called.
+  virtual void SetSwapBuffersCallback(Callback0::Type* callback);
+
  private:
   // The GPUProcessor holds a weak reference to the CommandBuffer. The
   // CommandBuffer owns the GPUProcessor and holds a strong reference to it