Use 'int' content quad coordinates all the way. (not for commit)

cc/output/gl_renderer.cc

Index: cc/output/gl_renderer.cc
diff --git a/cc/output/gl_renderer.cc b/cc/output/gl_renderer.cc
index 5190e955130c73fb2af387b345e22efbaa67df8c..f8115c879feeca7b08c979bb5df121d26d6597e1 100644
--- a/cc/output/gl_renderer.cc
+++ b/cc/output/gl_renderer.cc
@@ -2059,15 +2059,26 @@ void GLRenderer::DrawContentQuadNoAA(const DrawingFrame* frame,
     PrepareGeometry(CLIPPED_BINDING);
     clipped_geometry_->InitializeCustomQuadWithUVs(
         gfx::QuadF(gfx::RectF(quad->visible_rect)), gl_uv);
+    float gl_quad[8] = {
+        tile_quad.p4().x(), tile_quad.p4().y(), tile_quad.p1().x(),
+        tile_quad.p1().y(), tile_quad.p2().x(), tile_quad.p2().y(),
+        tile_quad.p3().x(), tile_quad.p3().y(),
+    };
+    gl_->Uniform2fv(uniforms.quad_location, 4, gl_quad);
   } else {
     PrepareGeometry(SHARED_BINDING);
+    float gl_quad[8] = {
+        quad->visible_rect.bottom_left().x(),
+        quad->visible_rect.bottom_left().y(),
+        quad->visible_rect.origin().x(),
+        quad->visible_rect.origin().y(),
+        quad->visible_rect.top_right().x(),
+        quad->visible_rect.top_right().y(),
+        quad->visible_rect.bottom_right().x(),
+        quad->visible_rect.bottom_right().y(),
+    };
+    gl_->Uniform2fv(uniforms.quad_location, 4, gl_quad);
   }
-  float gl_quad[8] = {
-      tile_quad.p4().x(), tile_quad.p4().y(), tile_quad.p1().x(),
-      tile_quad.p1().y(), tile_quad.p2().x(), tile_quad.p2().y(),
-      tile_quad.p3().x(), tile_quad.p3().y(),
-  };
-  gl_->Uniform2fv(uniforms.quad_location, 4, gl_quad);
 
   static float gl_matrix[16];
   ToGLMatrix(&gl_matrix[0],