Reduce chrome.exe .text size by 50 KB with static_library

ui/gfx/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
@@ skipping 447 matching lines @@
       ":gfx",
     ]
   } else {
     public_deps = [
       ":selection_bound_sources",
     ]
   }
 }
 
 # Depend on this to use selection_bound.h without pulling in all of gfx.
+# Cannot be a static_library in component builds due to exported functions
 source_set("selection_bound_sources") {
   visibility = [ ":*" ]
 
   sources = [
     "gfx_export.h",
     "selection_bound.cc",
     "selection_bound.h",
   ]
 
   defines = [ "GFX_IMPLEMENTATION" ]
@@ skipping 14 matching lines @@
   if (is_component_build) {
     public_deps = [
       ":gfx",
     ]
   } else {
     public_deps = [
       ":memory_buffer_sources",
     ]
   }
 }
+# Cannot be a static_library in component builds due to exported functions
 source_set("memory_buffer_sources") {
   visibility = [ ":*" ]  # Depend on through ":memory_buffer".
 
   # TODO(brettw) refactor this so these sources are in a coherent directory
   # structure rather than random samplings of ui/gfx and ui/gfx/mac.
   sources = [
     "buffer_format_util.cc",
     "buffer_format_util.h",
     "buffer_types.h",
     "generic_shared_memory_id.cc",
@@ skipping 217 matching lines @@
 if (is_android) {
   generate_jni("gfx_jni_headers") {
     sources = [
       "../android/java/src/org/chromium/ui/gfx/BitmapHelper.java",
       "../android/java/src/org/chromium/ui/gfx/DeviceDisplayInfo.java",
       "../android/java/src/org/chromium/ui/gfx/ViewConfigurationHelper.java",
     ]
     jni_package = "gfx"
   }
 }