cc: Remove SkSurface cache from Resource

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 38f79fb9fd4f2e3ef9a2ac32c8eed13eecd1442d..b08e88882c0f187c3489fa30a1cce417395e83d9 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -1097,57 +1097,38 @@ ResourceProvider::ScopedWriteLockGr::~ScopedWriteLockGr() {
   resource_provider_->UnlockForWrite(resource_);
 }
 
-SkSurface* ResourceProvider::ScopedWriteLockGr::GetSkSurface(
+skia::RefPtr<SkSurface> ResourceProvider::ScopedWriteLockGr::GetSkSurface(
     bool use_distance_field_text,
     bool can_use_lcd_text) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(resource_->locked_for_write);
 
-  bool create_surface =
-      !resource_->sk_surface.get() ||
-      !SurfaceHasMatchingProperties(use_distance_field_text, can_use_lcd_text);
-  if (create_surface) {
-    resource_provider_->LazyAllocate(resource_);
-
-    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;
-
-    class GrContext* gr_context = resource_provider_->GrContext();
-    skia::RefPtr<GrTexture> gr_texture =
-        skia::AdoptRef(gr_context->wrapBackendTexture(desc));
-    if (!gr_texture)
-      return nullptr;
-    uint32_t flags = use_distance_field_text
-                         ? SkSurfaceProps::kUseDistanceFieldFonts_Flag
-                         : 0;
-    // Use unknown pixel geometry to disable LCD text.
-    SkSurfaceProps surface_props(flags, kUnknown_SkPixelGeometry);
-    if (can_use_lcd_text) {
-      // LegacyFontHost will get LCD text and skia figures out what type to use.
-      surface_props =
-          SkSurfaceProps(flags, SkSurfaceProps::kLegacyFontHost_InitType);
-    }
-    resource_->sk_surface = skia::AdoptRef(SkSurface::NewRenderTargetDirect(
-        gr_texture->asRenderTarget(), &surface_props));
-  }
-  return resource_->sk_surface.get();
-}
+  resource_provider_->LazyAllocate(resource_);
 
-bool ResourceProvider::ScopedWriteLockGr::SurfaceHasMatchingProperties(
-    bool use_distance_field_text,
-    bool can_use_lcd_text) const {
-  const SkSurface* surface = resource_->sk_surface.get();
-  bool surface_uses_distance_field_text =
-      surface->props().isUseDistanceFieldFonts();
-  bool surface_can_use_lcd_text =
-      surface->props().pixelGeometry() != kUnknown_SkPixelGeometry;
-  return use_distance_field_text == surface_uses_distance_field_text &&
-         can_use_lcd_text == surface_can_use_lcd_text;
+  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;
+
+  class GrContext* gr_context = resource_provider_->GrContext();
+  skia::RefPtr<GrTexture> gr_texture =
+      skia::AdoptRef(gr_context->wrapBackendTexture(desc));
+  if (!gr_texture)
+    return skia::RefPtr<SkSurface>();
+  uint32_t flags =
+      use_distance_field_text ? SkSurfaceProps::kUseDistanceFieldFonts_Flag : 0;
+  // Use unknown pixel geometry to disable LCD text.
+  SkSurfaceProps surface_props(flags, kUnknown_SkPixelGeometry);
+  if (can_use_lcd_text) {
+    // LegacyFontHost will get LCD text and skia figures out what type to use.
+    surface_props =
+        SkSurfaceProps(flags, SkSurfaceProps::kLegacyFontHost_InitType);
+  }
+  return skia::AdoptRef(SkSurface::NewRenderTargetDirect(
+      gr_texture->asRenderTarget(), &surface_props));
 }
 
 ResourceProvider::SynchronousFence::SynchronousFence(