libgui: Enable -Weverything and -Werror

Enables -Weverything and -Werror, with just a few exceptions for
warnings we can't (or shouldn't need to) work around.

Change-Id: I034abec27bf4020d84af60d7acc1939c59986dd6
diff --git a/libs/gui/GraphicBufferAlloc.cpp b/libs/gui/GraphicBufferAlloc.cpp
index b360e81..9643402 100644
--- a/libs/gui/GraphicBufferAlloc.cpp
+++ b/libs/gui/GraphicBufferAlloc.cpp
@@ -31,9 +31,10 @@
 GraphicBufferAlloc::~GraphicBufferAlloc() {
 }
 
-sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
-        PixelFormat format, uint32_t usage, status_t* error) {
-    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
+sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t width,
+        uint32_t height, PixelFormat format, uint32_t usage, status_t* error) {
+    sp<GraphicBuffer> graphicBuffer(
+            new GraphicBuffer(width, height, format, usage));
     status_t err = graphicBuffer->initCheck();
     *error = err;
     if (err != 0 || graphicBuffer->handle == 0) {
@@ -42,7 +43,7 @@
         }
         ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
              "failed (%s), handle=%p",
-                w, h, strerror(-err), graphicBuffer->handle);
+                width, height, strerror(-err), graphicBuffer->handle);
         return 0;
     }
     return graphicBuffer;