cc: Trigger GPU rasterization based on a per-layer hint

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index f491f8b273bc19c0411b13698a0a9e323df03a17..3fb2010ae931bf8102d3f31a0477d5a2112b6cd4 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -391,6 +391,38 @@ void RenderThreadImpl::Init() {
   if (command_line.HasSwitch(cc::switches::kEnableGpuBenchmarking))
       RegisterExtension(GpuBenchmarkingExtension::Get());
 
+  is_impl_side_painting_enabled_ =
+      command_line.HasSwitch(switches::kEnableImplSidePainting) &&
+      !command_line.HasSwitch(switches::kDisableImplSidePainting);
+
+  is_map_image_enabled_ =
+      command_line.HasSwitch(switches::kEnableMapImage) &&
+      !command_line.HasSwitch(switches::kDisableMapImage);
+
+  if (command_line.HasSwitch(switches::kDisableLCDText)) {
+    is_lcd_text_enabled_ = false;
+  } else if (command_line.HasSwitch(switches::kEnableLCDText)) {
+    is_lcd_text_enabled_ = true;
+  } else {
+#if defined(OS_ANDROID)
+    is_lcd_text_enabled_ = false;
+#else
+    is_lcd_text_enabled_ = true;
+#endif
+  }
+
+  is_hybrid_rasterization_enabled_ = false;
+  is_gpu_rasterization_enabled_ = false;
+  if (is_impl_side_painting_enabled_) {
+    std::string rasterization_site =
+        command_line.GetSwitchValueASCII(switches::kRasterizationSite);
+    if (rasterization_site == "gpu" ||
+        command_line.HasSwitch(switches::kEnableBleedingEdgeRenderingFastPaths))
+      is_gpu_rasterization_enabled_ = true;
+    else if (rasterization_site == "hybrid")
+      is_hybrid_rasterization_enabled_ = true;
+  }
+
   // Note that under Linux, the media library will normally already have
   // been initialized by the Zygote before this instance became a Renderer.
   base::FilePath media_path;
@@ -738,7 +770,7 @@ void RenderThreadImpl::EnsureWebKitInitialized() {
 #if !defined(OS_ANDROID)
   use_skia_scaled_image_cache =
       command_line.HasSwitch(switches::kEnableDeferredImageDecoding) ||
-      cc::switches::IsImplSidePaintingEnabled();
+      is_impl_side_painting_enabled_;
 #endif
   if (!use_skia_scaled_image_cache)
     SkGraphics::SetImageCacheByteLimit(0u);