Create specialized code stubs for PixelArray loads.

src/arm/code-stubs-arm.h

Index: src/arm/code-stubs-arm.h
diff --git a/src/arm/code-stubs-arm.h b/src/arm/code-stubs-arm.h
index a79b2392d98a19a3660bb529734afdb6970aabd8..21bbe9964945d1d9118fb2b63b1ba45ba1598220 100644
--- a/src/arm/code-stubs-arm.h
+++ b/src/arm/code-stubs-arm.h
@@ -568,6 +568,20 @@ class RegExpCEntryStub: public CodeStub {
 };
 
 
+// Loads a indexed element from a pixel array.
+void GenerateFastPixelArrayLoad(MacroAssembler* masm,
+                                Register receiver,
+                                Register key,
+                                Register elements_map,
+                                Register elements,
+                                Register scratch1,
+                                Register scratch2,
+                                Register result,
+                                Label* not_pixel_array,
+                                Label* key_not_smi,
+                                Label* out_of_range);
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODE_STUBS_ARM_H_