Gallery.app: Add buttons to the cropping mode to specifying the aspect ratio.

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- ChromeOS-specific strings (included from generated_resources.grd).
      Everything in this file is wrapped in <if expr="chromeos">. -->
 <grit-part>
   <message name="IDS_EMPTY_STRING" desc="Empty string, exist only to make code generic. No translation required.">
   </message>
   <message name="IDS_CHROMEBOOK" desc="The localized name for Chromebook.">
     Chromebook
   </message>
   <message name="IDS_CHROMEBOX" desc="The localized name for Chromebox">
@@ skipping 327 matching lines @@
   </message>
   <message name="IDS_FILE_BROWSER_GALLERY_AUTOFIX" desc="In the Gallery, the title on the button that applies the Auto-Fix filter to a photo.">
     Auto-fix
   </message>
   <message name="IDS_FILE_BROWSER_GALLERY_FIXED" desc="In the Gallery, the text in a floating panel that notifies that the photo has been automatically fixed.">
     Fixed
   </message>
   <message name="IDS_FILE_BROWSER_GALLERY_CROP" desc="In the Gallery, the title on the button that cuts out a rectangular fragment from a photo">
     Crop
   </message>
+  <message name="IDS_FILE_BROWSER_GALLERY_ASPECT_RATIO_1_1" desc="Button label to fix aspect to 1:1 ratio when cropping.">
+    1x1
+  </message>
+  <message name="IDS_FILE_BROWSER_GALLERY_ASPECT_RATIO_4_6" desc="Button label to fix aspect to 4:6 ratio when cropping.">
+    4x6
+  </message>
+  <message name="IDS_FILE_BROWSER_GALLERY_ASPECT_RATIO_6_4" desc="Button label to fix aspect to 6:4 ratio when cropping.">
+    6x4
+  </message>
+  <message name="IDS_FILE_BROWSER_GALLERY_ASPECT_RATIO_5_7" desc="Button label to fix aspect to 5:7 ratio when cropping.">
+    5x7
+  </message>
+  <message name="IDS_FILE_BROWSER_GALLERY_ASPECT_RATIO_7_5" desc="Button label to fix aspect to 7:5 ratio when cropping.">
+    7x5
+  </message>
+  <message name="IDS_FILE_BROWSER_GALLERY_ASPECT_RATIO_16_9" desc="Button label to fix aspect to 16:9 ratio when cropping.">
+    16x9
+  </message>
+  <message name="IDS_FILE_BROWSER_GALLERY_ASPECT_RATIO_9_16" desc="Button label to fix aspect to 9:16 ratio when cropping.">
+    9x16
+  </message>
   <message name="IDS_FILE_BROWSER_GALLERY_EXPOSURE" desc="In the Gallery, the title on the button that applies the Brightness/Contrast filter to a photo.">
     Brightness
   </message>
   <message name="IDS_FILE_BROWSER_GALLERY_BRIGHTNESS" desc="In the Gallery, the text next to the Brightness slider.">
     Brightness
   </message>
   <message name="IDS_FILE_BROWSER_GALLERY_CONTRAST" desc="In the Gallery, the text next to the Contrast slider.">
     Contrast
   </message>
   <message name="IDS_FILE_BROWSER_GALLERY_ROTATE_LEFT" desc="In the Gallery, the title on the button that rotates the photo 90 degrees to the left (counterclockwise).">
@@ skipping 5172 matching lines @@
   </message>
 
   <!-- 'OK Google' voice search activation display strings -->
   <message name="IDS_FLAGS_OK_GOOGLE_NAME" desc="Name of about:flags option for Ok Google.">
     Enable 'Ok Google' to activate voice search.
   </message>
   <message name="IDS_FLAGS_OK_GOOGLE_DESCRIPTION" desc="Description of about:flags option Ok Google.">
     If enabled, there will be an option in chrome:settings to enable saying 'Ok Google' to activate voice search.
   </message>
 </grit-part>