Silence compiler warnings

Remove unused variables, add missing return and avoid comparing
unsigned integers with signed ones.

Change-Id: I9b295a5dc10927ec89471a424c93cf3b168cf078
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

3 files changed, 2 insertions, 3 deletions

diff --git a/lib/backing_store_qt.cpp b/lib/backing_store_qt.cpp
index 5c23734cf..bd33a0a4b 100644
--- a/lib/backing_store_qt.cpp
+++ b/lib/backing_store_qt.cpp
@@ -84,8 +84,6 @@ void BackingStoreQt::PaintToBackingStore(content::RenderProcessHost *process,
     gfx::Rect pixel_bitmap_rect = bitmap_rect;
 
     uint8_t* bitmapData = static_cast<uint8_t*>(dib->memory());
-    int width = m_pixelBuffer.size().width();
-    int height = m_pixelBuffer.size().height();
     const QImage img(bitmapData, pixel_bitmap_rect.width(), pixel_bitmap_rect.height(), QImage::Format_ARGB32);
 
     QPainter painter(&m_pixelBuffer);
diff --git a/lib/render_widget_host_view_qt.cpp b/lib/render_widget_host_view_qt.cpp
index 276ae9b4d..849b13c7d 100644
--- a/lib/render_widget_host_view_qt.cpp
+++ b/lib/render_widget_host_view_qt.cpp
@@ -252,6 +252,7 @@ GdkEventButton* RenderWidgetHostViewQt::GetLastMouseDown()
 
 gfx::NativeView RenderWidgetHostViewQt::BuildInputMethodsGtkMenu()
 {
+    return 0;
 }
 #endif  // defined(TOOLKIT_GTK)
 
diff --git a/lib/resource_bundle_qt.cpp b/lib/resource_bundle_qt.cpp
index 5fb62370f..af26a488a 100644
--- a/lib/resource_bundle_qt.cpp
+++ b/lib/resource_bundle_qt.cpp
@@ -88,7 +88,7 @@ class UI_EXPORT DataPackQt : public DataPack {
         {
             m_data = data;
 
-            if (kHeaderLength > m_data.size())
+            if (kHeaderLength > static_cast<size_t>(m_data.size()))
                 return false;
 
             const uint32* ptr = reinterpret_cast<const uint32*>(m_data.data());