Added telemetry pages for the canvas element.

tools/perf/page_sets/tough_canvas_cases.py

Index: tools/perf/page_sets/tough_canvas_cases.py
diff --git a/tools/perf/page_sets/tough_canvas_cases.py b/tools/perf/page_sets/tough_canvas_cases.py
index 5bbb01e0aae97aa4a79cfc6560c0ea25df040bd4..01724d02f3e9e7f7911acc9c2c916f6e142af803 100644
--- a/tools/perf/page_sets/tough_canvas_cases.py
+++ b/tools/perf/page_sets/tough_canvas_cases.py
@@ -82,7 +82,15 @@ class ToughCanvasCasesPageSet(story.StorySet):
       'file://tough_canvas_cases/canvas_toBlob.html',
       'file://../../../chrome/test/data/perf/canvas_bench/single_image.html',

[Justin Novosad, 2016/06/08 17:14:21]

This one too

[sebastienlc, 2016/06/08 19:06:28]

Done.

       'file://../../../chrome/test/data/perf/canvas_bench/many_images.html',
-      'file://tough_canvas_cases/rendering_throughput/canvas_arcs.html'
+      'file://tough_canvas_cases/rendering_throughput/canvas_arcs.html',
+      'file://tough_canvas_cases/rendering_throughput/canvas_lines.html',
+      'file://tough_canvas_cases/rendering_throughput/put_get_image_data.html',
+      'file://tough_canvas_cases/rendering_throughput/fill_shapes.html',
+      'file://tough_canvas_cases/rendering_throughput/stroke_shapes.html',
+      'file://tough_canvas_cases/rendering_throughput/bouncing_clipped_rectangles.html',
+      'file://tough_canvas_cases/rendering_throughput/bouncing_gradient_circles.html',
+      'file://tough_canvas_cases/rendering_throughput/bouncing_svg_images.html',
+      'file://tough_canvas_cases/rendering_throughput/bouncing_png_images.html'
     ]
 
     for url in urls_list: