aw: Use comparison DCHECKs where appropriate

android_webview/renderer/aw_render_view_ext.cc

 // Copyright (c) 2012 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 "android_webview/renderer/aw_render_view_ext.h"
 
 #include <string>
 
 #include "android_webview/common/aw_hit_test_data.h"
 #include "android_webview/common/render_view_messages.h"
@@ skipping 115 matching lines @@
   } else if (has_link_url && has_image_url && !is_javascript_scheme) {
     data->type = AwHitTestData::SRC_IMAGE_LINK_TYPE;
     data->extra_data_for_type = data->img_src.possibly_invalid_spec();
     if (absolute_link_url.is_valid())
       data->href = base::UTF8ToUTF16(absolute_link_url.possibly_invalid_spec());
   } else if (!has_link_url && has_image_url) {
     data->type = AwHitTestData::IMAGE_TYPE;
     data->extra_data_for_type = data->img_src.possibly_invalid_spec();
   } else if (is_editable) {
     data->type = AwHitTestData::EDIT_TEXT_TYPE;
-    DCHECK(data->extra_data_for_type.length() == 0);
+    DCHECK_EQ(0u, data->extra_data_for_type.length());
   }
 }
 
 }  // namespace
 
 AwRenderViewExt::AwRenderViewExt(content::RenderView* render_view)
     : content::RenderViewObserver(render_view), page_scale_factor_(0.0f) {
 }
 
 AwRenderViewExt::~AwRenderViewExt() {
@@ skipping 166 matching lines @@
   render_view()->GetWebView()->setFixedLayoutSize(size);
 }
 
 void AwRenderViewExt::OnSetBackgroundColor(SkColor c) {
   if (!render_view() || !render_view()->GetWebView())
     return;
   render_view()->GetWebView()->setBaseBackgroundColor(c);
 }
 
 }  // namespace android_webview