Implement HiDPI support in Pepper dev interface

ppapi/proxy/ppb_graphics_2d_proxy.cc

Index: ppapi/proxy/ppb_graphics_2d_proxy.cc
diff --git a/ppapi/proxy/ppb_graphics_2d_proxy.cc b/ppapi/proxy/ppb_graphics_2d_proxy.cc
index 0cbd3885af2dc51b4ea8a9a561c6d887f7b84e60..9957df20bf414e6770a227a02bc17e1729a5ad10 100644
--- a/ppapi/proxy/ppb_graphics_2d_proxy.cc
+++ b/ppapi/proxy/ppb_graphics_2d_proxy.cc
@@ -29,7 +29,8 @@ class Graphics2D : public Resource, public thunk::PPB_Graphics2D_API {
  public:
   Graphics2D(const HostResource& host_resource,
              const PP_Size& size,
-             PP_Bool is_always_opaque);
+             PP_Bool is_always_opaque,
+             float scale);
   virtual ~Graphics2D();
 
   // Resource.
@@ -57,6 +58,7 @@ class Graphics2D : public Resource, public thunk::PPB_Graphics2D_API {
 
   PP_Size size_;
   PP_Bool is_always_opaque_;
+  float scale_;
 
   // In the plugin, this is the current callback set for Flushes. When the
   // pointer is non-NULL, we're waiting for a flush ACK.
@@ -67,10 +69,12 @@ class Graphics2D : public Resource, public thunk::PPB_Graphics2D_API {
 
 Graphics2D::Graphics2D(const HostResource& host_resource,
                        const PP_Size& size,
-                       PP_Bool is_always_opaque)
+                       PP_Bool is_always_opaque,
+                       float scale)
     : Resource(OBJECT_IS_PROXY, host_resource),
       size_(size),
-      is_always_opaque_(is_always_opaque) {
+      is_always_opaque_(is_always_opaque),
+      scale_(scale) {
 }
 
 Graphics2D::~Graphics2D() {
@@ -157,17 +161,19 @@ PPB_Graphics2D_Proxy::~PPB_Graphics2D_Proxy() {
 PP_Resource PPB_Graphics2D_Proxy::CreateProxyResource(
     PP_Instance instance,
     const PP_Size& size,
-    PP_Bool is_always_opaque) {
+    PP_Bool is_always_opaque,
+    float scale) {
   PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
   if (!dispatcher)
     return 0;
 
   HostResource result;
   dispatcher->Send(new PpapiHostMsg_PPBGraphics2D_Create(
-      kApiID, instance, size, is_always_opaque, &result));
+      kApiID, instance, size, is_always_opaque, scale, &result));
   if (result.is_null())
     return 0;
-  return (new Graphics2D(result, size, is_always_opaque))->GetReference();
+  return (new Graphics2D(result, size, is_always_opaque, scale))
+      ->GetReference();
 }
 
 bool PPB_Graphics2D_Proxy::OnMessageReceived(const IPC::Message& msg) {
@@ -195,11 +201,12 @@ bool PPB_Graphics2D_Proxy::OnMessageReceived(const IPC::Message& msg) {
 void PPB_Graphics2D_Proxy::OnHostMsgCreate(PP_Instance instance,
                                            const PP_Size& size,
                                            PP_Bool is_always_opaque,
+                                           float scale,
                                            HostResource* result) {
   thunk::EnterResourceCreation enter(instance);
   if (enter.succeeded()) {
     result->SetHostResource(instance, enter.functions()->CreateGraphics2D(
-        instance, size, is_always_opaque));
+        instance, size, is_always_opaque, scale));
   }
 }