Bug 843555 - Part 1: Use a content texture client for Canvas. r=nical

gfx/layers/client/CanvasClient.cpp

@@ -52,7 +52,7 @@ void
 CanvasClient2D::Update(gfx::IntSize aSize, ClientCanvasLayer* aLayer)
 {
   if (!mTextureClient) {
-    mTextureClient = CreateTextureClient(TEXTURE_SHMEM);
+    mTextureClient = CreateTextureClient(TEXTURE_CONTENT);
     MOZ_ASSERT(mTextureClient, "Failed to create texture client");
   }