Don't preload rarely seen large images

chrome/browser/android/compositor/layer/tab_layer.cc

 // 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.
 
 #include "chrome/browser/android/compositor/layer/tab_layer.h"
 
 #include "base/i18n/rtl.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/layer_lists.h"
 #include "cc/layers/nine_patch_layer.h"
@@ skipping 106 matching lines @@
                                      shadow_resource_id);
   ui::ResourceManager::Resource* contour_resource =
       resource_manager_->GetResource(ui::ANDROID_RESOURCE_TYPE_STATIC,
                                      contour_resource_id);
   ui::ResourceManager::Resource* toolbar_resource =
       resource_manager_->GetResource(ui::ANDROID_RESOURCE_TYPE_DYNAMIC,
                                      toolbar_resource_id);
   ui::ResourceManager::Resource* close_btn_resource =
       resource_manager_->GetResource(ui::ANDROID_RESOURCE_TYPE_STATIC,
                                      close_button_resource_id);
-  ui::ResourceManager::Resource* back_logo_resource =
-      resource_manager_->GetResource(ui::ANDROID_RESOURCE_TYPE_STATIC,
-                                     back_logo_resource_id);
+  ui::ResourceManager::Resource* back_logo_resource = nullptr;
 
   DecorationTitle* title_layer = nullptr;
 
   //----------------------------------------------------------------------------
   // Handle Border Scaling (Upscale/Downscale everything until final scaling)
   //----------------------------------------------------------------------------
   width /= border_scale;
   height /= border_scale;
   shadow_x /= border_scale;
   shadow_y /= border_scale;
@@ skipping 70 matching lines @@
                         height + shadow_padding_size.height());
   gfx::Size border_size(width + border_padding_size.width() * side_border_scale,
                         height + border_padding_size.height());
   gfx::Size contour_size(
       width + contour_padding_size.width() * side_border_scale,
       height + contour_padding_size.height());
   gfx::Size close_button_size(close_btn_width, border_padding.y());
   gfx::Size title_size(width - close_btn_effective_width, border_padding.y());
   gfx::Size back_logo_size;
   // TODO(clholgat): Figure out why the back logo is null sometimes.
-  if (back_logo_resource)
-    back_logo_size = back_logo_resource->size;
+  if (back_visible) {
+    back_logo_resource =
+        resource_manager_->GetResource(ui::ANDROID_RESOURCE_TYPE_STATIC,
+                                       back_logo_resource_id);
+    if (back_logo_resource)
+      back_logo_size = back_logo_resource->size;
+  }
 
   // Store this size at a point as it might go negative during the inset
   // calculations.
   gfx::Point desired_content_size_pt(
       descaled_local_content_area.width(),
       descaled_local_content_area.height() - toolbar_impact_height);
 
   // Shrink the toolbar layer so we properly clip if it's offset.
   gfx::Size toolbar_size(
       toolbar_layer_->layer()->bounds().width(),
@@ skipping 347 matching lines @@
       title_->AddChild(layer);
     }
   }
 
   if (title)
     title->SetUIResourceIds();
 }
 
 }  //  namespace android
 }  //  namespace chrome