Add gyp flag use_minimum_resources and exclude unnecessary resources

Remove following resources:
1. Resources for media player control bar, this part is not usually
used, thus it could be overriden by web developers.
2. The ui resources are for aura/views, Android doesn't need it.

This patch is the backport from Crosswalk-lite

BUG=https://crosswalk-project.org/jira/browse/XWALK-3928
TEST=Build with/without flag use_minimum_resources and simple test on XWalkCoreShell.apk
SIZE_REDUCED=212k(Release build on ARM)

Author: Lin Sun

build/common.gypi

@@ -565,6 +565,9 @@
       # Enable web audio hrtf by default.
       'disable_webaudio_hrtf%': 0,
 
+      # Include all resources by default.
+      'use_minimum_resources%': 0,
+
       # Use native android functions in place of ICU.  Not supported by most
       # components.
       'use_icu_alternatives_on_android%': 0,
@@ -1192,6 +1195,7 @@
     'disable_file_support%': '<(disable_file_support)',
     'disable_ftp_support%': '<(disable_ftp_support)',
     'disable_webaudio_hrtf%': '<(disable_webaudio_hrtf)',
+    'use_minimum_resources%': '<(use_minimum_resources)',
     'use_icu_alternatives_on_android%': '<(use_icu_alternatives_on_android)',
     'enable_task_manager%': '<(enable_task_manager)',
     'sas_dll_path%': '<(sas_dll_path)',
@@ -2136,6 +2140,9 @@
       ['disable_webaudio_hrtf==1', {
         'grit_defines': ['-D', 'disable_webaudio_hrtf'],
       }],
+      ['use_minimum_resources==1', {
+        'grit_defines': ['-D', 'use_minimum_resources'],
+      }],
       ['enable_media_router==1', {
         'grit_defines': ['-D', 'enable_media_router'],
       }],
@@ -2983,6 +2990,9 @@
       ['disable_ftp_support==1', {
         'defines': ['DISABLE_FTP_SUPPORT=1'],
       }],
+      ['use_minimum_resources==1', {
+        'defines': ['USE_MINIMUM_RESOURCES=1'],
+      }],
       ['enable_supervised_users==1', {
         'defines': ['ENABLE_SUPERVISED_USERS=1'],
       }],

content/child/blink_platform_impl.cc

@@ -793,6 +793,7 @@ struct DataResource {
 const DataResource kDataResources[] = {
     {"missingImage", IDR_BROKENIMAGE, ui::SCALE_FACTOR_100P},
     {"missingImage@2x", IDR_BROKENIMAGE, ui::SCALE_FACTOR_200P},
+#if !defined(USE_MINIMUM_RESOURCES)
     {"mediaplayerPause", IDR_MEDIAPLAYER_PAUSE_BUTTON, ui::SCALE_FACTOR_100P},
     {"mediaplayerPauseHover",
      IDR_MEDIAPLAYER_PAUSE_BUTTON_HOVER,
@@ -906,6 +907,7 @@ const DataResource kDataResources[] = {
     {"mediaplayerOverlayPlay",
      IDR_MEDIAPLAYER_OVERLAY_PLAY_BUTTON,
      ui::SCALE_FACTOR_100P},
+#endif
     {"panIcon", IDR_PAN_SCROLL_ICON, ui::SCALE_FACTOR_100P},
     {"searchCancel", IDR_SEARCH_CANCEL, ui::SCALE_FACTOR_100P},
     {"searchCancelPressed", IDR_SEARCH_CANCEL_PRESSED, ui::SCALE_FACTOR_100P},

ui/resources/ui_resources.grd

@@ -12,6 +12,15 @@
   </outputs>
   <release seq="1">
     <structures fallback_to_low_resolution="true">
+      <structure type="chrome_scaled_image" name="IDR_MENU_CHECK_CHECKED" file="common/menu_check.png" />
+      <structure type="chrome_scaled_image" name="IDR_MENU_DROPARROW" file="cros/menu_droparrow.png" />
+      <if expr="use_aura or toolkit_views or (is_posix and not is_macosx and not is_ios)">
+        <structure type="chrome_scaled_image" name="IDR_PROGRESS_BAR" file="linux/linux-progress-bar.png" />
+        <structure type="chrome_scaled_image" name="IDR_PROGRESS_BORDER_LEFT" file="linux/linux-progress-border-left.png" />
+        <structure type="chrome_scaled_image" name="IDR_PROGRESS_BORDER_RIGHT" file="linux/linux-progress-border-right.png" />
+        <structure type="chrome_scaled_image" name="IDR_PROGRESS_VALUE" file="linux/linux-progress-value.png" />
+      </if>
+      <if expr="not pp_ifdef('use_minimum_resources')">
       <!-- KEEP THESE IN ALPHABETICAL ORDER!  DO NOT ADD TO RANDOM PLACES JUST
            BECAUSE YOUR RESOURCES ARE FUNCTIONALLY RELATED OR FALL UNDER THE
            SAME CONDITIONALS. -->
@@ -306,7 +315,6 @@
       <if expr="is_macosx or is_ios">
         <structure type="chrome_scaled_image" name="IDR_MENU_HIERARCHY_ARROW" file="mac/menu_hierarchy_arrow.png" />
       </if>
-      <structure type="chrome_scaled_image" name="IDR_MENU_CHECK_CHECKED" file="common/menu_check.png" />
       <if expr="toolkit_views">
         <structure type="chrome_scaled_image" name="IDR_MENU_CHECK" file="cros/menu_check.png" />
         <structure type="chrome_scaled_image" name="IDR_MENU_CHECK_CHECKED_DARK_BACKGROUND" file="common/menu_check_white.png" />
@@ -324,7 +332,6 @@
         <structure type="chrome_scaled_image" name="IDR_SLIDER_ACTIVE_THUMB" file="slider_thumb.png" />
         <structure type="chrome_scaled_image" name="IDR_SLIDER_DISABLED_THUMB" file="slider_thumb_disabled.png" />
       </if>
-      <structure type="chrome_scaled_image" name="IDR_MENU_DROPARROW" file="cros/menu_droparrow.png" />
       <structure type="chrome_scaled_image" name="IDR_MESSAGE_CLOSE" file="common/message_close.png" />
       <if expr="desktop_linux">
         <structure type="chrome_scaled_image" name="IDR_MINIMIZE" file="linux/linux_minimize.png" />
@@ -387,12 +394,6 @@
         <structure type="chrome_scaled_image" name="IDR_PANEL_BOTTOM_LEFT_CORNER" file="panel_bottom_left_corner.png" />
         <structure type="chrome_scaled_image" name="IDR_PANEL_BOTTOM_RIGHT_CORNER" file="panel_bottom_right_corner.png" />
       </if>
-      <if expr="use_aura or toolkit_views or (is_posix and not is_macosx and not is_ios)">
-        <structure type="chrome_scaled_image" name="IDR_PROGRESS_BAR" file="linux/linux-progress-bar.png" />
-        <structure type="chrome_scaled_image" name="IDR_PROGRESS_BORDER_LEFT" file="linux/linux-progress-border-left.png" />
-        <structure type="chrome_scaled_image" name="IDR_PROGRESS_BORDER_RIGHT" file="linux/linux-progress-border-right.png" />
-        <structure type="chrome_scaled_image" name="IDR_PROGRESS_VALUE" file="linux/linux-progress-value.png" />
-      </if>
       <if expr="toolkit_views">
         <structure type="chrome_scaled_image" name="IDR_RADIO" file="common/radio.png" />
         <structure type="chrome_scaled_image" name="IDR_RADIO_CHECKED" file="common/radio_checked.png" />
@@ -593,6 +594,7 @@
         <structure type="chrome_scaled_image" name="IDR_WINDOW_BUBBLE_SHADOW_SPIKE_SMALL_RIGHT" file="common/window_bubble_shadow_spike_small_right.png" />
         <structure type="chrome_scaled_image" name="IDR_WINDOW_BUBBLE_SHADOW_SPIKE_SMALL_TOP" file="common/window_bubble_shadow_spike_small_top.png" />
       </if>
+      </if>
     </structures>
   </release>
 </grit>