Replace WGC3D visibility extension with resource_usage extension. [Part 2 of 3]

content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc

Index: content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc
diff --git a/content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc b/content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc
index 51886d15798b8ae38ea2542508ca32feb0aba657..6992b287060b244b503b1ad40063d58e070c0660 100644
--- a/content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc
+++ b/content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.cc
@@ -450,12 +450,21 @@ void WebGraphicsContext3DCommandBufferImpl::unmapTexSubImage2DCHROMIUM(
   gl_->UnmapTexSubImage2DCHROMIUM(mem);
 }
 
-void WebGraphicsContext3DCommandBufferImpl::setVisibilityCHROMIUM(
-    bool visible) {
+void WebGraphicsContext3DCommandBufferImpl::setResourceUsageCHROMIUM(
+    ResourceUsage resourceUsage) {
   gl_->Flush();
-  context_->SetSurfaceVisible(visible);
-  if (!visible)
-    gl_->FreeEverything();
+  switch (resourceUsage) {
+    case RESOURCE_USAGE_FULL:
+      context_->SetResourceUsage(gfx::GLSurface::RESOURCE_USAGE_FULL);
+      break;
+    case RESOURCE_USAGE_LESS:
+      context_->SetResourceUsage(gfx::GLSurface::RESOURCE_USAGE_LESS);
+      gl_->FreeEverything();
+      break;
+    case RESOURCE_USAGE_NONE:
+      context_->SetResourceUsage(gfx::GLSurface::RESOURCE_USAGE_NONE);
+      break;
+  }
 }
 
 void WebGraphicsContext3DCommandBufferImpl::copyTextureToParentTextureCHROMIUM(