b=979489; Implement SimpleTiledContentClient and friends; r=jrmuizel

gfx/layers/client/ClientLayerManager.cpp

@@ -21,6 +21,7 @@
 #include "mozilla/layers/PLayerChild.h"  // for PLayerChild
 #include "mozilla/layers/LayerTransactionChild.h"
 #include "mozilla/layers/TextureClientPool.h" // for TextureClientPool
+#include "mozilla/layers/SimpleTextureClientPool.h" // for SimpleTextureClientPool
 #include "nsAString.h"
 #include "nsIWidget.h"                  // for nsIWidget
 #include "nsTArray.h"                   // for AutoInfallibleTArray
@@ -474,6 +475,21 @@ ClientLayerManager::GetTexturePool(SurfaceFormat aFormat)
   return texturePoolMember->mTexturePool;
 }
 
+SimpleTextureClientPool*
+ClientLayerManager::GetSimpleTileTexturePool(SurfaceFormat aFormat)
+{
+  int index = (int) aFormat;
+  mSimpleTilePools.EnsureLengthAtLeast(index+1);
+
+  if (mSimpleTilePools[index].get() == nullptr) {
+    mSimpleTilePools[index] = new SimpleTextureClientPool(aFormat, IntSize(TILEDLAYERBUFFER_TILE_SIZE,
+                                                                           TILEDLAYERBUFFER_TILE_SIZE),
+                                                          mForwarder);
+  }
+
+  return mSimpleTilePools[index];
+}
+
 void
 ClientLayerManager::ClearCachedResources(Layer* aSubtree)
 {