Add --disable-canvas-aa flag to Chrome-on-Android startup.

content/browser/android/content_startup_flags.cc

Index: content/browser/android/content_startup_flags.cc
diff --git a/content/browser/android/content_startup_flags.cc b/content/browser/android/content_startup_flags.cc
index 84cc6fa32b067374687d2f010e6cb403af8b1124..9e5f9cc43e4c13b2063ce369f8207d8fdc1f24e9 100644
--- a/content/browser/android/content_startup_flags.cc
+++ b/content/browser/android/content_startup_flags.cc
@@ -72,6 +72,9 @@ void SetContentCommandLineFlags(int max_render_process_count,
   parsed_command_line->AppendSwitch(switches::kEnableFixedLayout);
   parsed_command_line->AppendSwitch(switches::kEnableViewport);
 
+  // Disable <canvas> path antialiasing.
+  parsed_command_line->AppendSwitch(switches::kDisable2dCanvasAntialiasing);
+
   if (!plugin_descriptor.empty()) {
     parsed_command_line->AppendSwitchNative(
       switches::kRegisterPepperPlugins, plugin_descriptor);