cc: turn on distance field text on animated layers

cc/resources/resource_provider.cc

Index: cc/resources/resource_provider.cc
diff --git a/cc/resources/resource_provider.cc b/cc/resources/resource_provider.cc
index ded347763485a32184d0aa950f329e685ce204c4..17ae2456e61d7a31bc952bea73fbfea5b3fa0b30 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -995,38 +995,19 @@ void ResourceProvider::UnlockForWriteToGpuMemoryBuffer(ResourceId id) {
   resource->read_lock_fences_enabled = true;
 }
 
-const ResourceProvider::Resource* ResourceProvider::LockForWriteToSkSurface(
-    ResourceId id) {
+void ResourceProvider::LockForWriteToSkSurface(ResourceId id) {
   Resource* resource = GetResource(id);
   DCHECK_EQ(GLTexture, resource->type);
   DCHECK(CanLockForWrite(id));
 
-  resource->locked_for_write = true;
-  if (!resource->sk_surface) {
-    class GrContext* gr_context = GrContext();
-    // TODO(alokp): Implement TestContextProvider::GrContext().
-    if (!gr_context)
-      return resource;
-
-    LazyAllocate(resource);
+  class GrContext* gr_context = GrContext();
+  // TODO(alokp): Implement TestContextProvider::GrContext().
+  if (!gr_context)
+    return;
 
-    GrBackendTextureDesc desc;
-    desc.fFlags = kRenderTarget_GrBackendTextureFlag;
-    desc.fWidth = resource->size.width();
-    desc.fHeight = resource->size.height();
-    desc.fConfig = ToGrPixelConfig(resource->format);
-    desc.fOrigin = kTopLeft_GrSurfaceOrigin;
-    desc.fTextureHandle = resource->gl_id;
-    skia::RefPtr<GrTexture> gr_texture =
-        skia::AdoptRef(gr_context->wrapBackendTexture(desc));
-    SkSurface::TextRenderMode text_render_mode =
-        use_distance_field_text_ ? SkSurface::kDistanceField_TextRenderMode
-                                 : SkSurface::kStandard_TextRenderMode;
-    resource->sk_surface = skia::AdoptRef(SkSurface::NewRenderTargetDirect(
-        gr_texture->asRenderTarget(), text_render_mode));
-  }
+  LazyAllocate(resource);
 
-  return resource;
+  resource->locked_for_write = true;
 }
 
 void ResourceProvider::UnlockForWriteToSkSurface(ResourceId id) {
@@ -1141,16 +1122,50 @@ ResourceProvider::ScopedWriteLockGpuMemoryBuffer::
 ResourceProvider::ScopedWriteLockGr::ScopedWriteLockGr(
     ResourceProvider* resource_provider,
     ResourceProvider::ResourceId resource_id)
-    : resource_provider_(resource_provider),
-      resource_id_(resource_id),
-      sk_surface_(resource_provider->LockForWriteToSkSurface(resource_id)
-                      ->sk_surface.get()) {
+    : resource_provider_(resource_provider), resource_id_(resource_id) {
+  resource_provider->LockForWriteToSkSurface(resource_id);
 }
 
 ResourceProvider::ScopedWriteLockGr::~ScopedWriteLockGr() {
   resource_provider_->UnlockForWriteToSkSurface(resource_id_);
 }
 
+SkSurface* ResourceProvider::ScopedWriteLockGr::GetSkSurface(
+    bool use_distance_field_text) {
+  Resource* resource = resource_provider_->GetResource(resource_id_);
+  DCHECK(resource->locked_for_write);
+
+  bool surface_uses_distance_field =
+      resource_provider_->use_distance_field_text_ || use_distance_field_text;
+  // If the surface doesn't have the correct dff setting, recreate the surface
+  // within the resource.
+  if (!resource->sk_surface ||
+      surface_uses_distance_field !=
+          resource->sk_surface->props().isUseDistanceFieldFonts()) {
+    class GrContext* gr_context = resource_provider_->GrContext();
+    // TODO(alokp): Implement TestContextProvider::GrContext().
+    if (!gr_context)
+      return nullptr;
+
+    GrBackendTextureDesc desc;
+    desc.fFlags = kRenderTarget_GrBackendTextureFlag;
+    desc.fWidth = resource->size.width();
+    desc.fHeight = resource->size.height();
+    desc.fConfig = ToGrPixelConfig(resource->format);
+    desc.fOrigin = kTopLeft_GrSurfaceOrigin;
+    desc.fTextureHandle = resource->gl_id;
+    skia::RefPtr<GrTexture> gr_texture =
+        skia::AdoptRef(gr_context->wrapBackendTexture(desc));
+    SkSurface::TextRenderMode text_render_mode =
+        use_distance_field_text ? SkSurface::kDistanceField_TextRenderMode
+                                : SkSurface::kStandard_TextRenderMode;
+    resource->sk_surface = skia::AdoptRef(SkSurface::NewRenderTargetDirect(
+        gr_texture->asRenderTarget(), text_render_mode));
+    return resource->sk_surface.get();
+  }
+  return nullptr;
+}
+
 ResourceProvider::ResourceProvider(
     OutputSurface* output_surface,
     SharedBitmapManager* shared_bitmap_manager,