Support stream textures with the synchronous compositor

This adds a thread-safe StreamTextureManager for GLInProcessContext.

It further adds some plumbing for the webkit thread to be able
 to create a StreamTextureFactory from the main thread (see render_view_impl.cc)
 with the ability to extract the thread-safe SurfaceTexture(Bridge) for a given stream.

This is nothing but a crazy amount of plumbing to achieve this:
- StreamTexture::Update() i.e. SurfaceTexture::updateTexImage needs to happen on the GL thread
with a current context
- The StreamTextureFactory and Proxy are referenced from the WebmediaPlayer instance which lives on
the main thread
- The callback for invalidating the video is posted to the
compositor thread directly (here: UI thread) bypassing the main thread

BUG=239760
NOTRY=True

Review URL: https://chromiumcodereview.appspot.com/23234003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@219057 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 8 insertions, 0 deletions

diff --git a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
index 66c7a53..9207ef9 100644
--- a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
+++ b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
@@ -1117,6 +1117,11 @@ DELEGATE_TO_GL_2(bindTexImage2DCHROMIUM, BindTexImage2DCHROMIUM,
 DELEGATE_TO_GL_2(releaseTexImage2DCHROMIUM, ReleaseTexImage2DCHROMIUM,
                  WGC3Denum, WGC3Dint)
 
+DELEGATE_TO_GL_1R(createStreamTextureCHROMIUM, CreateStreamTextureCHROMIUM,
+                  WebGLId, WebGLId)
+DELEGATE_TO_GL_1(destroyStreamTextureCHROMIUM, DestroyStreamTextureCHROMIUM,
+                 WebGLId)
+
 void* WebGraphicsContext3DInProcessCommandBufferImpl::mapBufferCHROMIUM(
     WGC3Denum target, WGC3Denum access) {
   ClearContext();
diff --git a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h
index f96607d..d763e14 100644
--- a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h
+++ b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h
@@ -468,6 +468,9 @@ class WEBKIT_GPU_EXPORT WebGraphicsContext3DInProcessCommandBufferImpl
   virtual void bindTexImage2DCHROMIUM(WGC3Denum target, WGC3Dint imageId);
   virtual void releaseTexImage2DCHROMIUM(WGC3Denum target, WGC3Dint imageId);
 
+  virtual WebGLId createStreamTextureCHROMIUM(WebGLId texture);
+  virtual void destroyStreamTextureCHROMIUM(WebGLId texture);
+
   virtual void texStorage2DEXT(
       WGC3Denum target, WGC3Dint levels, WGC3Duint internalformat,
       WGC3Dint width, WGC3Dint height);