[Android] Keep -O2 gfx optimizations

The optimizations had minimal impact on library size, and should be kept
permanently.

BUG=419051

Review URL: https://codereview.chromium.org/643253002

Cr-Commit-Position: refs/heads/master@{#300572}

ui/gfx/BUILD.gn

@@ -290,7 +290,6 @@ component("gfx") {
     #  deps += [ "//base:base_java" ]
     #}
 
-    # TODO(jdduke): Revisit optimization after gauging benefit, crbug/419051.
     if (!is_debug) {
       configs -= [ "//build/config/compiler:optimize" ]
       configs += [ "//build/config/compiler:optimize_max" ]

ui/gfx/geometry/BUILD.gn

@@ -61,7 +61,6 @@ component("geometry") {
     "//ui/gfx:gfx_export",
   ]
 
-  # TODO(jdduke): Revisit optimization after gauging benefit, crbug/419051.
   if (is_android && !is_debug) {
     configs -= [ "//build/config/compiler:optimize" ]
     configs += [ "//build/config/compiler:optimize_max" ]

ui/gfx/gfx.gyp

@@ -65,7 +65,6 @@
         'geometry/vector3d_f.cc',
         'geometry/vector3d_f.h',
       ],
-      # TODO(jdduke): Revisit optimization after gauging benefit, crbug/419051.
       'includes': [
         '../../build/android/increase_size_for_speed.gypi',
       ],