Make various gfx classes more amenable to use as compile-time constants.

ui/gfx/geometry/insets_f.cc

Index: ui/gfx/geometry/insets_f.cc
diff --git a/ui/gfx/geometry/insets_f.cc b/ui/gfx/geometry/insets_f.cc
index e4368913ccda0f44ccea5a831a777d79c69ce29c..c1bc27ec524552fde8e4f93fb6b15245c76effc0 100644
--- a/ui/gfx/geometry/insets_f.cc
+++ b/ui/gfx/geometry/insets_f.cc
@@ -8,18 +8,6 @@
 
 namespace gfx {
 
-InsetsF::InsetsF() : InsetsF(0.f) {}
-
-InsetsF::InsetsF(float all) : InsetsF(all, all, all, all) {}
-
-InsetsF::InsetsF(float vertical, float horizontal)
-    : InsetsF(vertical, horizontal, vertical, horizontal) {}
-
-InsetsF::InsetsF(float top, float left, float bottom, float right)
-    : top_(top), left_(left), bottom_(bottom), right_(right) {}
-
-InsetsF::~InsetsF() {}
-
 std::string InsetsF::ToString() const {
   // Print members in the same order of the constructor parameters.
   return base::StringPrintf("%f,%f,%f,%f", top(),  left(), bottom(), right());