Bug 1356960 - Avoid to allocate WebRenderTextureHost for TextureHost of VideoBridgeParent and VRManagerParent r=jerry

gfx/layers/composite/TextureHost.cpp

@@ -90,12 +90,14 @@ public:
 };
 
 static bool
-WrapWithWebRenderTextureHost(LayersBackend aBackend,
+WrapWithWebRenderTextureHost(ISurfaceAllocator* aDeallocator,
+                             LayersBackend aBackend,
                              TextureFlags aFlags)
 {
   if (!gfxVars::UseWebRender() ||
       (aFlags & TextureFlags::SNAPSHOT) ||
-      (aBackend != LayersBackend::LAYERS_WR)) {
+      (aBackend != LayersBackend::LAYERS_WR) ||
+      (!aDeallocator->UsesImageBridge() && !aDeallocator->AsCompositorBridgeParentBase())) {
     return false;
   }
   return true;
@@ -240,7 +242,7 @@ TextureHost::Create(const SurfaceDescriptor& aDesc,
       MOZ_CRASH("GFX: Unsupported Surface type host");
   }
 
-  if (WrapWithWebRenderTextureHost(aBackend, aFlags)) {
+  if (WrapWithWebRenderTextureHost(aDeallocator, aBackend, aFlags)) {
     result = new WebRenderTextureHost(aDesc, aFlags, result);
   }
 

gfx/layers/ipc/CompositorBridgeParent.h

@@ -117,6 +117,8 @@ public:
 
   virtual ShmemAllocator* AsShmemAllocator() override { return this; }
 
+  virtual CompositorBridgeParentBase* AsCompositorBridgeParentBase() override { return this; }
+
   virtual mozilla::ipc::IPCResult RecvSyncWithCompositor() override { return IPC_OK(); }
 
   virtual void ObserveLayerUpdate(uint64_t aLayersId, uint64_t aEpoch, bool aActive) = 0;

gfx/layers/ipc/ISurfaceAllocator.h

@@ -29,6 +29,7 @@ class DataSourceSurface;
 namespace layers {
 
 class CompositableForwarder;
+class CompositorBridgeParentBase;
 class TextureForwarder;
 
 class ShmemAllocator;
@@ -89,6 +90,8 @@ public:
   virtual LegacySurfaceDescriptorAllocator*
   AsLegacySurfaceDescriptorAllocator() { return nullptr; }
 
+  virtual CompositorBridgeParentBase* AsCompositorBridgeParentBase() { return nullptr; }
+
   // ipc info
 
   virtual bool IPCOpen() const { return true; }