Add command line switches and about:flag to enable FPS indicator and compositor layer tree.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index cb9318d028bfd3d0671f4e6b7b30b227e9da9cd6..cee0eddb3427d3fa5b6c0020fb1cff71dbec7c30 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -4056,6 +4056,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_COMPOSITED_LAYER_BORDERS_DESCRIPTION" desc="Description of the 'Composited layer borders' lab.">
         Renders a border around composited Render Layers to help debug and study layer compositing.
       </message>
+      <message name="IDS_FLAGS_SHOW_FPS_COUNTER" desc="Name of the 'Show FPS counter lab.">

[jamesr, 2011/03/04 19:31:04]

mismatched '

+        FPS counter.
+      </message>
+      <message name="IDS_FLAGS_SHOW_FPS_COUNTER_DESCRIPTION" desc="Description of the 'Show FPS counter' lab.">
+        Shows a page's actual frame rate, in frames per second, when hardware acceleration is active.
+      </message>
       <message name="IDS_FLAGS_COMPOSITE_TO_TEXTURE_NAME" desc="Name of the 'Offscreen Compositing' lab.">
         Composite to Texture
       </message>