Comment fixes in ExpensiveCanvasHeuristicParameters.h

third_party/WebKit/Source/platform/graphics/ExpensiveCanvasHeuristicParameters.h

Index: third_party/WebKit/Source/platform/graphics/ExpensiveCanvasHeuristicParameters.h
diff --git a/third_party/WebKit/Source/platform/graphics/ExpensiveCanvasHeuristicParameters.h b/third_party/WebKit/Source/platform/graphics/ExpensiveCanvasHeuristicParameters.h
index f50b5e06a76496184aeb18132b7c4d41ca92df1f..bd66ebb7979b676cf50913478843c06e3483b1eb 100644
--- a/third_party/WebKit/Source/platform/graphics/ExpensiveCanvasHeuristicParameters.h
+++ b/third_party/WebKit/Source/platform/graphics/ExpensiveCanvasHeuristicParameters.h
@@ -67,11 +67,11 @@ enum {
 
   GetImageDataForcesNoAcceleration = 1,
 
-  // Whan a canvas is used as a source image, if its destination is
+  // When a canvas is used as a source image, if its destination is
   // non-accelerated and the source canvas is accelerated, a readback
-  // from the gpu is necessary. This option cause the source canvas to
+  // from the gpu is necessary. This option causes the source canvas to
   // switch to non-accelerated when this situation is encountered to
-  // prevent future canvas to canvas draws from requiring a readback.
+  // prevent future canvas-to-canvas draws from requiring a readback.
   DisableAccelerationToAvoidReadbacks = 1,
 
   // When drawing very large images to canvases, there is a point where